sweet vermouth vs vermouth

sweet vermouth and vermouth both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet vermouth	Yes	No	No	No
vermouth	Yes	No	No	No

As nouns, vermouth is a hypernym of sweet vermouth; that is, vermouth is a word with a broader meaning than sweet vermouth:

sweet vermouth: sweet dark amber variety
vermouth: any of several white wines flavored with aromatic herbs; used as aperitifs or in mixed drinks

sweet vermouth (noun)	vermouth (noun)
sweet dark amber variety	any of several white wines flavored with aromatic herbs; used as aperitifs or in mixed drinks