hush vs suppress

hush is a noun but suppress is not a noun.

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

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

Other hypernyms of hush include conquer, stamp down, subdue.

hush (noun)	suppress (noun)
(poetic) tranquil silence

hush (verb)	suppress (verb)
become quiet or still; fall silent	bring under control by force or authority
cause to be quiet or not talk	lessen to the point of stopping
run water over the ground to erode (soil), revealing the underlying strata and valuable minerals	put out of one's consciousness
wash by removing particles	consciously restrain from showing; of emotions, desires, impulses, or behavior
become quiet or quieter	come down on or keep down by unjust use of one's authority