dressmaker vs outfitter

dressmaker and outfitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
dressmaker	Yes	No	No	No
outfitter	Yes	No	No	No

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

Other hyponyms of dressmaker include cloakmaker, furrier, modiste, needlewoman, seamstress, sempstress, stitcher, sartor, seamster, tailor.

dressmaker (noun)	outfitter (noun)
a person who makes garments	a shop that provides equipment for some specific purpose
	someone who sells men's clothes