lower vs devalue

lower is a noun but devalue is not a noun.

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

As verbs, devalue is a hypernym of lower; that is, devalue is a word with a broader meaning than lower:

lower (noun)	devalue (noun)
the lower of two berths

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

lower (verb)	devalue (verb)
make lower or quieter	lower the value or quality of
set lower	lose in value
cause to drop or sink	remove the value from; deprive of its value
move something or somebody to a lower position
look angry or sullen, wrinkle one's forehead, as if to signal disapproval