Synonyms of brainiac

brainiac

noun

ˈbrā-nē-ˌak 

as in genius

a very smart person

a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up

Synonyms & Similar Words

• genius
• wizard
• nerd
• brain
• intellect
• wiz
• thinker
• whiz
• geek
• intellectual
• savant
• polymath
• virtuoso
• master
• sage
• highbrow
• blue
• bluestocking
• Renaissance man
• natural
• ace
• longhair
• polyhistor
• crackerjack

Antonyms & Near Antonyms

• idiot
• moron
• dunce
• dolt
• imbecile
• blockhead
• knucklehead
• know-nothing
• dope
• nitwit
• pinhead
• dummy
• numskull
• goon
• ignoramus
• illiterate
• dumbbell
• fathead
• hammerhead
• dodo
• lowbrow
• half-wit
• philistine
• ass
• fool
• jackass
• donkey
• jerk
• clown
• beast
• creep
• heel
• cretin
• snake
• skunk
• cad
• louse
• boor
• lout
• cur
• anti-intellectual
• stinker
• churl

Example Sentences

Recent Examples of brainiac

Not the brainiacs in charge, apparently. — Rachel Marsden, Hartford Courant, 17 Apr. 2026

Even at a flagship public university, the true type-A brainiacs might have to work harder to find one another. — Rose Horowitch, The Atlantic, 4 Apr. 2026

The bright-eyed Redmayne really fits the part of a brainiac – especially in a story about one of our greatest minds. — Brian Truitt, USA Today, 9 Mar. 2026

Like the other characters in the book, Harper is a stock figure, the brainiac child, but her fearlessness in the face of a crumbling, dishonest world reinvigorates the type. — Hannah Gold, New Yorker, 21 Jan. 2026

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