hush vs subdue

hush is a noun but subdue is not a noun.

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

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

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

hush (noun)	subdue (noun)
(poetic) tranquil silence

hush (verb)	subdue (verb)
become quiet or still; fall silent	correct by punishment or discipline
cause to be quiet or not talk	bring under control by force or authority
run water over the ground to erode (soil), revealing the underlying strata and valuable minerals	make subordinate, dependent, or subservient
wash by removing particles	get on top of; deal with successfully
become quiet or quieter	hold within limits and control
	put down by force or intimidation