terpene vs terpinene

terpene and terpinene both are nouns.

Word	Noun	Adjective	Verb	Adverb
terpene	Yes	No	No	No
terpinene	Yes	No	No	No

As nouns, terpinene is a hyponym of terpene; that is, terpinene is a word with a more specific, narrower meaning than terpene:

terpene: an unsaturated hydrocarbon obtained from plants
terpinene: any of a group of isomeric hydrocarbons that are classified as terpenes.

Other hyponyms of terpene include limonene.

terpene (noun)	terpinene (noun)
an unsaturated hydrocarbon obtained from plants	any of a group of isomeric hydrocarbons that are classified as terpenes.