acetylene vs hexine

acetylene and hexine both are nouns.

Word	Noun	Adjective	Verb	Adverb
acetylene	Yes	No	No	No
hexine	Yes	No	No	No

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

acetylene: a colorless flammable gas used chiefly in welding and in organic synthesis
hexine: a hydrocarbon, C6H10, of the acetylene series.

acetylene (noun)	hexine (noun)
a colorless flammable gas used chiefly in welding and in organic synthesis	a hydrocarbon, C6H10, of the acetylene series.