suppression vs quelling

suppression and quelling both are nouns.

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

As nouns, suppression and quelling are synonyms defined as:

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

Other synonyms of suppression include crushing, stifling.

suppression (noun)	quelling (noun)
the act of withholding or withdrawing some book or writing from publication or circulation	forceful prevention; putting down by power or authority
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