stitcher vs dressmaker

stitcher and dressmaker both are nouns.

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

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

Other hypernyms of stitcher include finisher, garment-worker, garment worker, garmentmaker.

stitcher (noun)	dressmaker (noun)
a garmentmaker who performs the finishing steps	a person who makes garments