depress vs lower

depress is not a noun while lower is a noun.

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

As verbs, depress and lower are synonyms defined as:

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

Other hypernyms of depress include bring down, get down, let down, take down.

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

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

depress (verb)	lower (verb)
lessen the activity or force of	make lower or quieter
press down	set lower
cause to drop or sink	cause to drop or sink
lower someone's spirits; make downhearted	move something or somebody to a lower position
lower (prices or markets)	look angry or sullen, wrinkle one's forehead, as if to signal disapproval