agony aunt vs woman

agony aunt and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
agony aunt	Yes	No	No	No
woman	Yes	No	No	No

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

agony aunt: a female newspaper columnist who answers questions and offers advice on personal problems to people who write in
woman: an adult female person (as opposed to a man)

Other hypernyms of agony aunt include newspaper columnist, adult female.

agony aunt (noun)	woman (noun)
a female newspaper columnist who answers questions and offers advice on personal problems to people who write in	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