acetophenetidin vs painkiller

acetophenetidin and painkiller both are nouns.

Word	Noun	Adjective	Verb	Adverb
acetophenetidin	Yes	No	No	No
painkiller	Yes	No	No	No

As nouns, painkiller is a hypernym of acetophenetidin; that is, painkiller is a word with a broader meaning than acetophenetidin:

acetophenetidin: a white crystalline compound used as an analgesic and also as an antipyretic
painkiller: a medicine used to relieve pain

Other hypernyms of acetophenetidin include analgesic, anodyne, pain pill.

acetophenetidin (noun)	painkiller (noun)
a white crystalline compound used as an analgesic and also as an antipyretic	a medicine used to relieve pain