lower vs depress

lower is a noun but depress is not a noun.

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

As verbs, lower and depress are synonyms defined as:

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

Other hyponyms of lower include reef, dip, incline.

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

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

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