soften vs softener

soften is not a noun while softener is a noun.

Word	Noun	Adjective	Verb	Adverb
soften	No	No	Yes	No
softener	Yes	No	No	No

soften (noun)	softener (noun)
	a substance added to another to make it less hard

soften (verb)	softener (verb)
become soft or softer
make soft or softer
lessen in force or effect
make less severe or harsh
protect from impact
make (images or sounds) soft or softer
give in, as to influence or pressure