suppress vs quash

suppress and quash both are verbs.

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

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

Other hyponyms of suppress include keep down, reduce, repress, subdue, subjugate.

suppress (verb)	quash (verb)
bring under control by force or authority	put down by force or intimidation
lessen to the point of stopping	declare invalid
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