apply vs gum

apply is not a noun while gum is a noun.

Word	Noun	Adjective	Verb	Adverb
apply	No	No	Yes	No
gum	Yes	No	Yes	No

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

Other hyponyms of apply include dab, swab, swob, daub, dress, cream, cold-cream, putty, sponge on, clap on, slam on, slap on.

apply (noun)	gum (noun)
	the tissue (covered by mucous membrane) of the jaws that surrounds the bases of the teeth
	a preparation (usually made of sweetened chicle) for chewing
	any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum
	wood or lumber from any of various gum trees especially the sweet gum
	any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying
	cement consisting of a sticky substance that is used as an adhesive

apply (verb)	gum (verb)
ask (for something)	exude or form gum
refer (a word or name) to a person or thing	become sticky
put into service; make work or employ for a particular purpose or for its inherent or natural purpose	grind with the gums; chew without teeth and with great difficulty
coat, cover or smear a surface with	cover, fill, fix or smear with or as if with gum
give or convey physically
avail oneself to
ensure observance of laws and rules
apply oneself to
be pertinent or relevant or applicable
be applicable to; as to an analysis