widen vs increase

widen is not a noun while increase is a noun.

Word	Noun	Adjective	Verb	Adverb
widen	No	No	Yes	No
increase	Yes	No	Yes	No

As verbs, increase is a hypernym of widen; that is, increase is a word with a broader meaning than widen:

As verbs, increase is a hypernym of widen; that is, increase is a word with a broader meaning than widen:

widen (noun)	increase (noun)
	the act of increasing something
	the amount by which something increases
	a change resulting in an increase
	a process of becoming larger or longer or more numerous or more important
	a quantity that is added

widen (verb)	increase (verb)
become broader or wider or more extensive	become bigger or greater in amount
extend in scope or range or area	make bigger or more
make wider
make (clothes) larger