widening vs broadening

widening and broadening both are nouns.

Word	Noun	Adjective	Verb	Adverb
widening	Yes	No	No	No
broadening	Yes	No	No	No

As nouns, widening and broadening are synonyms defined as:

As nouns, widening and broadening are synonyms defined as:

widening (noun)	broadening (noun)
the act of making something wider	the action of making broader
a part of a road that has been widened to allow cars to pass or park	the act of making something wider
an increase in width	an increase in width