muffle vs muffler

muffle and muffler both are nouns.

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

muffle (noun)	muffler (noun)
a kiln with an inner chamber for firing things at a low temperature	a scarf worn around the neck
	a tubular acoustic device inserted in the exhaust system that is designed to reduce noise
	a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations

muffle (verb)	muffler (verb)
suppress in order to conceal or hide
deaden (a sound or noise), especially by wrapping