dapperness vs last word

dapperness and last word both are nouns.

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

As nouns, last word is a hypernym of dapperness; that is, last word is a word with a broader meaning than dapperness:

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

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