acetanilid vs painkiller

acetanilid and painkiller both are nouns.

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

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

acetanilid: a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen)
painkiller: a medicine used to relieve pain

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

acetanilid (noun)	painkiller (noun)
a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen)	a medicine used to relieve pain