acetylene vs alkyne

acetylene and alkyne both are nouns.

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

As nouns, acetylene and alkyne are synonyms defined as:

acetylene and alkyne: a colorless flammable gas used chiefly in welding and in organic synthesis

Other synonyms of acetylene include ethyne.

acetylene (noun)	alkyne (noun)
a colorless flammable gas used chiefly in welding and in organic synthesis	a colorless flammable gas used chiefly in welding and in organic synthesis