lumbermill vs mill

lumbermill and mill both are nouns.

Word	Noun	Adjective	Verb	Adverb
lumbermill	Yes	No	No	No
mill	Yes	No	Yes	No

As nouns, mill is a hypernym of lumbermill; that is, mill is a word with a broader meaning than lumbermill:

lumbermill: a mill for dressing logs and lumber
mill: a plant consisting of one or more buildings with facilities for manufacturing

Other hypernyms of lumbermill include factory, manufactory, manufacturing plant.

lumbermill (noun)	mill (noun)
a mill for dressing logs and lumber	the act of grinding to a powder or dust
	machinery that processes materials by grinding or crushing
	a plant consisting of one or more buildings with facilities for manufacturing

lumbermill (verb)	mill (verb)
	grind with a mill
	produce a ridge around the edge of
	roll out (metal) with a rolling machine
	move about in a confused manner