depress vs press down

depress and press down both are verbs.

Word	Noun	Adjective	Verb	Adverb
depress	No	No	Yes	No
press down	No	No	Yes	No

As verbs, depress and press down are synonyms defined as:

depress (verb)	press down (verb)
lessen the activity or force of	press down
press down
cause to drop or sink
lower someone's spirits; make downhearted
lower (prices or markets)