quieten vs subdue

quieten and subdue both are verbs.

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

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

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

quieten (verb)	subdue (verb)
cause to be quiet or not talk	correct by punishment or discipline
make calm or still	bring under control by force or authority
become quiet or quieter	make subordinate, dependent, or subservient
	get on top of; deal with successfully
	hold within limits and control
	put down by force or intimidation