In this page you can discover 25 synonyms, antonyms, idiomatic expressions, and related words for know-it-all, like: smart aleck, wise guy, walking encyclopedia, smarty, witling, wiseacre, brash, smarty-pants, wisenheimer, know-all and malapert.

: one who claims to know everything also : one who disdains advice.

a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.

Synonyms & Near Synonyms for omniscient. all-powerful, almighty, omnipotent, supreme.

Synonyms of know-it-all

1. smart aleck,
2. smarty.
3. (or smartie),
4. smarty-pants,
5. wiseacre,
6. wiseass,
7. wise guy,
8. wisenheimer.

Know-it-alls may have a cluster of personality characteristics, including impulsivity, poor listening skills and an inability to read social cues. These could be symptomatic of certain mental disorders, such as attention deficit hyperactivity disorder or narcissistic personality disorder.

The know-it-all likes to act smart. That’s why they go so much length just to prove that they’re knowledgeable. They even use big words with the sole purpose of impressing others. In worse cases, know-it-alls will exaggerate information so that nobody would question their statements.

pejorative term to qualify a person who pretends or appears to know everything about everything.

One who is omniscient literally knows all.

Omniscience (/ɒmˈnɪʃəns/) is the capacity to know everything. In monotheistic religions, such as Sikhism and the Abrahamic religions, this is an attribute of God.

know-it-all

1. smart aleck,
2. smarty.
3. (or smartie),
4. smarty-pants,
5. wiseacre,
6. wiseass,
7. wise guy,
8. wisenheimer.

While know-it-all friends like this can be entertaining and even helpful, after a while you may be so over listening to all that hot air. “Know-it-alls are often people we like a lot at first,” says Andrea Bonior, PhD, a psychologist and author of The Friendship Fix.