Braggart and Smart-ass

Braggart noun - Someone who boasts.

Smart-ass and braggart are semantically related In some cases you can use "Smart-ass" instead a noun "Braggart".

Smart-ass adjective - Making light of something usually regarded as serious or sacred.

Braggart and smart-ass are semantically related in one who claims full knowledge topic. Sometimes you can use "Braggart" instead a noun phrase "Smart-ass".