repress vs keep down

repress and keep down both are verbs.

Word	Noun	Adjective	Verb	Adverb
repress	No	No	Yes	No
keep down	No	No	Yes	No

As verbs, repress and keep down are synonyms defined as:

Other synonyms of repress include quash, reduce, subdue, subjugate.

repress (verb)	keep down (verb)
block the action of	manage not to throw up
put out of one's consciousness	place a limit on the number of
suppress in order to conceal or hide	put down by force or intimidation
put down by force or intimidation
impede or hinder the natural development or self-expression of