keep down vs repress

keep down and repress both are verbs.

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

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

Other synonyms of keep down include quash, reduce, subdue, subjugate.

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