spokeswoman vs woman

spokeswoman and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
spokeswoman	Yes	No	No	No
woman	Yes	No	No	No

As nouns, woman is a hypernym of spokeswoman; that is, woman is a word with a broader meaning than spokeswoman:

Other hypernyms of spokeswoman include interpreter, representative, spokesperson, voice, adult female.

spokeswoman (noun)	woman (noun)
a female spokesperson	women as a class
	an adult female person (as opposed to a man)
	a female person who plays a significant role (wife or mistress or girlfriend) in the life of a particular man