suggestion vs approach

suggestion and approach both are nouns.

Word	Noun	Adjective	Verb	Adverb
suggestion	Yes	No	No	No
approach	Yes	No	Yes	No

As nouns, approach is a hyponym of suggestion; that is, approach is a word with a more specific, narrower meaning than suggestion:

Other hyponyms of suggestion include breath, hint, intimation, ghost, touch, trace, advance, feeler, overture.

suggestion (noun)	approach (noun)
the act of inducing hypnosis	the act of drawing spatially closer to something
an idea that is suggested	a relatively short golf shot intended to put the ball onto the putting green
the sequential mental process in which one thought leads to another by association	ideas or actions intended to deal with a problem or situation
a proposal offered for acceptance or rejection	a way of entering or leaving
persuasion formulated as a suggestion	the temporal property of becoming nearer in time
a just detectable amount	a close approximation
	a tentative suggestion designed to elicit the reactions of others
	the event of one object coming closer to another
	the final path followed by an aircraft as it is landing

suggestion (verb)	approach (verb)
	make advances to someone, usually with a proposal or suggestion
	move towards
	come near in time
	begin to deal with
	come near or verge on, resemble, come nearer in quality, or character