Have you ever wanted to throttle someone because their idea was so stupid? Well, while I don’t recommend strangulation, it can be gratifying to tell someone that their suggestion is just plain dumb. The English language gives you plenty of options for how to express that idea, though, so don’t get stuck using the same old words all the time. We have tons of different words for ‘stupid’, and in this post, we will explore 10 ‘dumb’ synonyms, including a “stupid thesaurus” infographic at the end. Happy learning, moron! 😋


THROTTLE Meaning (Next Step English Visual Vocabulary Card)


GRATIFYING Meaning (Next Step English Visual Vocabulary Card)


MORON Meaning (Dumb Synonym) (Next Step English Visual Vocabulary Card)


Learn 10 Different Words for Stupid (Next Step English) (Dumb Synonyms)


Related: Learn 10 synonyms for ‘go away’ + practice them with these mini-dictations


DUMB SYNONYM 1: Cockamamie


If you’re looking for another word for ‘stupid’ that’s also a bit playful, ‘cockamamie‘ could be the word for you. This word generally makes people laugh more than it offends people. ‘Cockamamie’ is an informal word you can use to call someone’s idea ridiculous or silly.


You can also use it to say that a story someone has just told is ridiculous or unlikely to be true.


Julie: I’ve finally figured out how to lose weight! I’m going to eat only pumpkin seeds for the next two weeks!
Priscilla: Of all the cockamamie weight-loss ideas you’ve floated over the years, this one takes the cake! I’ve never heard anything so ridiculous in all my born days!


FLOAT Meaning (Next Step English Visual Vocabulary Card)


TAKE THE CAKE Idiom Meaning (Next Step English Visual Vocabulary Card)


IN ALL MY BORN DAYS Idiom Meaning (Next Step English Visual Vocabulary Card)


Related: Do you know these French loanwords in English?


DUMB SYNONYM 2: Hare-Brained


A hare-brained idea is an idea that is crazy and unlikely to succeed. This is another informal ‘stupid’ synonym, and it’s one that also makes people smile. You can use it to talk about someone’s idea, story, plan, or theory.


Noah: My brother has cooked up another hare-brained idea about how to get dad out of prison.
Ted: Good grief. Please tell me it’s not another scheme to dissolve the jailhouse walls with lye. That was a great one.


COOK UP Phrasal Verb Meaning (Next Step English Visual Vocabulary Card)




DISSOLVE meaning (Next Step English visual vocabulary card)


LYE meaning (Next Step English visual vocabulary card)


DUMB SYNONYM 3: Feather-Brained


Similarly, a feather-brained idea is an idea that is very silly, but not in a good way.


Carolina: You doddering dimwit! You dopey dolt! I’ve had enough of you and your feather-brained ideas!
Adam: Wow, that’s a bit harsh. All I suggested was that we reach out to Bill to ask for his support.


DODDERING Meaning (Next Step English Visual Vocabulary Card)


DIMWIT meaning (Next Step English visual vocabulary card)


DOPEY Meaning (Stupid Synonym) (Next Step English)


DOLT Meaning (Stupid Thesaurus) (Next Step English)


HARSH Meaning (Next Step English Visual Vocabulary Card)


REACH OUT TO Phrasal Verb (Next Step English Visual Vocabulary Card)


Related: Learn 14 summer words with Pincy Cat




Another way to say that someone’s idea is stupid is to say that it is asinine. An asinine idea is an idea that is stupid or silly. This is a formal word, and it is always disapproving.


Heather: What did David want?
Don: Nothing important. He’d come up with another asinine plan to get more Twitter followers. He thought it would be a good idea to pay all the high school students to follow him.



Related: 11 English face idioms + practice quiz


DUMB SYNONYM 5: Imbecilic


An imbecile is a very stupid person, so an imbecilic idea is a very stupid idea.


Tex: Let’s get out of here. The village idiot will be here soon to spring his next “big” idea on us.
William: Don’t be such a jerk. It’s not like you’re the world’s most brilliant mind, Tex. You’ve had a few imbecilic suggestions over the years.


VILLAGE IDIOT meaning (stupid synonym) (Next Step English)


SPRING ON Phrasal Verb Meaning (Next Step English Visual Vocabulary Card)


DUMB SYNONYM 6: Bird-Brained


This next ‘stupid’ synonym is one of my favorites. A birdbrain is a very stupid person, so a bird-brained idea is a very stupid idea. This is another of those ‘dumb’ synonyms that often makes people smile.


Jack: My darling, I know you’re insecure, but you look ravishing! Sofia Loren herself would be jealous!
Jackie: Ha! What a bird-brained observation! I look like a pumpkin, and you know it, but I love how you see me. Come here and give me a kiss!


RAVISHING Meaning (Next Step English Visual Vocabulary Card)


Related: Learn the names for different types of kisses in English 💋


DUMB SYNONYM 7: Half-Baked


A half-baked idea is an idea that isn’t well planned or thought out. This is an informal word.


Hillary: It just occurred to me that Shelby would make a great administrative assistant. We should ask her before we put an ad online!
Ashleigh: Sweetheart, that idea is half-baked at best. Shelby is Tim’s sister, and if she’s working here, he’s going to use it as an excuse to drop in whenever he wants.


AT BEST idiom meaning (Next Step English)


Related: Learn 20 phrasal verbs with ‘take’




‘Idiot’ is another word for a very stupid person. When we say that something is idiotic, we mean that it is very stupid.


Bart: Woohoo! I just got my paycheck! Want to hit the slots with me for the weekend?
Melissa: Of all the idiotic ideas you’ve had, that is the worst! You’ll blow your whole wad within an hour!


HIT THE SLOTS Idiom Meaning (Next Step English Visual Vocabulary Card)


BLOW YOUR WAD Idiom Meaning (Next Step English)



Related: Learn 33 new words with the song “The Lusty Month of May”


DUMB SYNONYM 9: Foolhardy


A foolhardy idea or plan is an idea or plan that involves taking unnecessary risks.


Debbie: We don’t need to buy tickets. There’s a hole in the fence we can wriggle through.
Nestor: Let’s not be foolhardy. If they catch us, we could go to jail!


WRIGGLE Meaning (Next Step English Visual Vocabulary Card)


Related: English tips from Alberto Alonso


DUMB SYNONYM 10: Ill-Conceived


At last, we’ve come to the end of this ‘stupid’ thesaurus! Something that is ill-conceived is badly planned or badly designed.


Matt: If I have to sit through another meeting with Fred and his litany of his ill-conceived notions, my head is going to explode.
Wendy: You’re telling me. That buffoon thinks he’s the world’s greatest expert. Unfortunately, he’s the boss’s son, so we’ve got to grin and bear it.


LITANY Meaning (Next Step English Visual Vocabulary Card)


NOTION Meaning (Next Step English Visual Vocabulary Card)


YOU'RE TELLING ME Idiom Meaning (Next Step English)


BUFFOON Meaning (Next Step English Stupid Thesaurus)


GRIN AND BEAR IT Idiom Meaning (Next Step English)


Your Quick + Easy “Stupid Thesaurus” Infographic 😘


Bravo, English learner! You’ve come to the end of our thesaurus of stupidity! Here’s an infographic of these ten ‘dumb’ synonyms that you’re free to download. I hope you enjoy using these different ways to say ‘stupid’!


Dumb Synonyms Infographic (Next Step English)


Related: If you like these different words for ‘stupid’, you may enjoy some of the other synonyms posts here on Next Step English.



Skyrocket Your Vocabulary


Are you learning English? Are you a word nerd? Join our email family to learn the vocabulary that native speakers don't expect you to know. Once a week, you will get advanced English lessons not available anywhere else.


They're fun. They're different. And, yes, they're completely free!


You will also receive occasional marketing emails, but I will never spam you or sell your information, ever, and it's easy to unsubscribe.

Woohoo! Now go check your inbox and click CONFIRM, or you won't be added to our email family. (Don't see the confirmation email? Check your Spam folder.)

Pin It on Pinterest

Share This