lour vs decrease

lour is not a noun while decrease is a noun.

Word	Noun	Adjective	Verb	Adverb
lour	No	No	Yes	No
decrease	Yes	No	Yes	No

As verbs, decrease is a hypernym of lour; that is, decrease is a word with a broader meaning than lour:

Other hypernyms of lour include lessen, minify.

lour (noun)	decrease (noun)
	the act of decreasing or reducing something
	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

lour (verb)	decrease (verb)
look angry or sullen, wrinkle one's forehead, as if to signal disapproval	decrease in size, extent, or range
make lower or quieter	make become smaller
set lower