modify vs cushion

modify is not a noun while cushion is a noun.

Word	Noun	Adjective	Verb	Adverb
modify	No	No	Yes	No
cushion	Yes	No	Yes	No

As verbs, cushion is a hyponym of modify; that is, cushion is a word with a more specific, narrower meaning than modify:

modify (noun)	cushion (noun)
	a soft bag filled with air or a mass of padding such as feathers or foam rubber etc.
	a mechanical damper; absorbs energy of sudden impulses
	the layer of air that supports a hovercraft or similar vehicle

modify (verb)	cushion (verb)
make less severe or harsh or extreme	protect from impact
add a modifier to a constituent
cause to change; make different; cause a transformation