muffle vs stifle

muffle and stifle both are nouns.

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

As verbs, muffle and stifle are synonyms defined as:

Other synonyms of muffle include repress, smother, strangle.

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

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