vinyl cyanide vs cyanide

vinyl cyanide and cyanide both are nouns.

Word	Noun	Adjective	Verb	Adverb
vinyl cyanide	Yes	No	No	No
cyanide	Yes	No	No	No

As nouns, cyanide is a hypernym of vinyl cyanide; that is, cyanide is a word with a broader meaning than vinyl cyanide:

vinyl cyanide: a colorless liquid unsaturated nitrile made from propene
cyanide: any of a class of organic compounds containing the cyano radical -CN

Other hypernyms of vinyl cyanide include nitril, nitrile.

vinyl cyanide (noun)	cyanide (noun)
a colorless liquid unsaturated nitrile made from propene	an extremely poisonous salt of hydrocyanic acid
	any of a class of organic compounds containing the cyano radical -CN