dampen vs tone down

dampen and tone down both are verbs.

Word	Noun	Adjective	Verb	Adverb
dampen	No	No	Yes	No
tone down	No	No	Yes	No

As verbs, dampen and tone down are synonyms defined as:

Other synonyms of dampen include damp, dull, muffle, mute.

dampen (verb)	tone down (verb)
lessen in force or effect	make less strong or intense; soften
make moist	deaden (a sound or noise), especially by wrapping
check; keep in check (a fire)
make vague or obscure or make (an image) less visible
reduce the amplitude (of oscillations or waves)
suppress or constrain so as to lessen in intensity
deaden (a sound or noise), especially by wrapping