lower vs scowl

lower and scowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
lower	Yes	Yes	Yes	No
scowl	Yes	No	Yes	No

As verbs, scowl is a hyponym of lower; that is, scowl is a word with a more specific, narrower meaning than lower:

lower: look angry or sullen, wrinkle one's forehead, as if to signal disapproval
scowl: frown with displeasure

lower (noun)	scowl (noun)
the lower of two berths	a facial expression of dislike or displeasure

lower (adjective)	scowl (adjective)
the bottom one of two

lower (verb)	scowl (verb)
make lower or quieter	frown with displeasure
set lower
cause to drop or sink
move something or somebody to a lower position
look angry or sullen, wrinkle one's forehead, as if to signal disapproval