strangle vs muffle

strangle is not a noun while muffle is a noun.

Word	Noun	Adjective	Verb	Adverb
strangle	No	No	Yes	No
muffle	Yes	No	Yes	No

As verbs, strangle and muffle are synonyms defined as:

Other synonyms of strangle include repress, smother, stifle.

strangle (noun)	muffle (noun)
	a kiln with an inner chamber for firing things at a low temperature

strangle (verb)	muffle (verb)
constrict (someone's) throat and keep from breathing	suppress in order to conceal or hide
struggle for breath; have insufficient oxygen intake	deaden (a sound or noise), especially by wrapping
prevent the progress or free movement of
die from strangulation
kill by squeezing the throat of so as to cut off the air
suppress in order to conceal or hide