snifter vs drinking glass

snifter and drinking glass both are nouns.

Word	Noun	Adjective	Verb	Adverb
snifter	Yes	No	No	No
drinking glass	Yes	No	No	No

As nouns, drinking glass is a hypernym of snifter; that is, drinking glass is a word with a broader meaning than snifter:

snifter: a globular glass with a small top; used for serving brandy
drinking glass: a container made of glass for holding liquids while drinking

Other hypernyms of snifter include glass.

snifter (noun)	drinking glass (noun)
a globular glass with a small top; used for serving brandy	a container made of glass for holding liquids while drinking