stifle vs muffle

stifle and muffle both are nouns.

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

As verbs, stifle and muffle are synonyms defined as:

Other synonyms of stifle include repress, smother, strangle.

stifle (noun)	muffle (noun)
joint between the femur and tibia in a quadruped; corresponds to the human knee	a kiln with an inner chamber for firing things at a low temperature

stifle (verb)	muffle (verb)
suppress or constrain so as to lessen in intensity	suppress in order to conceal or hide
be asphyxiated; die from lack of oxygen	deaden (a sound or noise), especially by wrapping
suppress in order to conceal or hide
impair the respiration of or obstruct the air passage of