cannon fire vs drumfire

cannon fire and drumfire both are nouns.

Word	Noun	Adjective	Verb	Adverb
cannon fire	Yes	No	No	No
drumfire	Yes	No	No	No

As nouns, drumfire is a hyponym of cannon fire; that is, drumfire is a word with a more specific, narrower meaning than cannon fire:

Other hyponyms of cannon fire include cannonade, high-angle fire, mortar fire, zone fire.

cannon fire (noun)	drumfire (noun)
fire delivered by artillery	intense and continuous artillery fire