smart aleck vs wiseacre

smart aleck and wiseacre both are nouns.

Word	Noun	Adjective	Verb	Adverb
smart aleck	Yes	No	No	No
wiseacre	Yes	No	No	No

As nouns, smart aleck and wiseacre are synonyms defined as:

smart aleck and wiseacre: an upstart who makes conceited, sardonic, insolent comments

Other synonyms of smart aleck include weisenheimer, wise guy, wisenheimer.

smart aleck (noun)	wiseacre (noun)
an upstart who makes conceited, sardonic, insolent comments	an upstart who makes conceited, sardonic, insolent comments