suppress vs keep down

suppress and keep down both are verbs.

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

As verbs, keep down is a hyponym of suppress; that is, keep down is a word with a more specific, narrower meaning than suppress:

Other hyponyms of suppress include quash, reduce, repress, subdue, subjugate.

suppress (verb)	keep down (verb)
bring under control by force or authority	manage not to throw up
lessen to the point of stopping	place a limit on the number of
put out of one's consciousness	put down by force or intimidation
consciously restrain from showing; of emotions, desires, impulses, or behavior
come down on or keep down by unjust use of one's authority