last word vs chic

last word and chic both are nouns.

Word	Noun	Adjective	Verb	Adverb
last word	Yes	No	No	No
chic	Yes	Yes	No	No

As nouns, last word and chic are synonyms defined as:

Other synonyms of last word include chichi, chicness, modishness, smartness, stylishness, swank.

last word (noun)	chic (noun)
elegance by virtue of being fashionable	elegance by virtue of being fashionable
the final statement in a verbal argument
an authoritative statement

last word (adjective)	chic (adjective)
	elegant and stylish