last word vs chichi

last word and chichi both are nouns.

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

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

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

last word (noun)	chichi (noun)
elegance by virtue of being fashionable	elegance by virtue of being fashionable
the final statement in a verbal argument	someone who dresses in a trendy fashionable way
an authoritative statement

last word (adjective)	chichi (adjective)
	affectedly trendy and fashionable