silence vs stamp down

silence is a noun but stamp down is not a noun.

Word	Noun	Adjective	Verb	Adverb
silence	Yes	No	Yes	No
stamp down	No	No	Yes	No

As verbs, stamp down is a hypernym of silence; that is, stamp down is a word with a broader meaning than silence:

Other hypernyms of silence include conquer, subdue, suppress.

As verbs, stamp down is a hypernym of silence; that is, stamp down is a word with a broader meaning than silence:

Other hypernyms of silence include conquer, subdue, suppress.

silence (noun)	stamp down (noun)
the absence of sound
a refusal to speak when expected
the trait of keeping things secret
the state of being silent (as when no one is speaking)

silence (verb)	stamp down (verb)
cause to be quiet or not talk	bring under control by force or authority
keep from expression, for example by threats or pressure