stylishness vs last word

stylishness and last word both are nouns.

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

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

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

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