outfitter vs dressmaker

outfitter and dressmaker both are nouns.

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

As nouns, dressmaker is a hypernym of outfitter; that is, dressmaker is a word with a broader meaning than outfitter:

Other hypernyms of outfitter include garment-worker, garment worker, garmentmaker.

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