stifling vs suppression

stifling and suppression both are nouns.

Word	Noun	Adjective	Verb	Adverb
stifling	Yes	Yes	No	No
suppression	Yes	No	No	No

As nouns, stifling and suppression are synonyms defined as:

stifling and suppression: forceful prevention; putting down by power or authority

Other synonyms of stifling include crushing, quelling.

stifling (noun)	suppression (noun)
forceful prevention; putting down by power or authority	the act of withholding or withdrawing some book or writing from publication or circulation
	forceful prevention; putting down by power or authority
	(psychology) the conscious exclusion of unacceptable thoughts or desires
	the failure to develop some part or organ

stifling (adjective)	suppression (adjective)
characterized by oppressive heat and humidity