quash vs suppress

quash and suppress both are verbs.

Word	Noun	Adjective	Verb	Adverb
quash	No	No	Yes	No
suppress	No	No	Yes	No

As verbs, suppress is a hypernym of quash; that is, suppress is a word with a broader meaning than quash:

Other hypernyms of quash include crush, oppress.

quash (verb)	suppress (verb)
put down by force or intimidation	bring under control by force or authority
declare invalid	lessen to the point of stopping
	put out of one's consciousness
	consciously restrain from showing; of emotions, desires, impulses, or behavior
	come down on or keep down by unjust use of one's authority