blouse vs shirtwaister

blouse and shirtwaister both are nouns.

Word	Noun	Adjective	Verb	Adverb
blouse	Yes	No	No	No
shirtwaister	Yes	No	No	No

As nouns, shirtwaister is a hyponym of blouse; that is, shirtwaister is a word with a more specific, narrower meaning than blouse:

Other hyponyms of blouse include garibaldi, guimpe, middy, middy blouse, shirtwaist.

blouse (noun)	shirtwaister (noun)
a top worn by women	a blouse with buttons down the front