allow vs clear

allow is not a noun while clear is a noun.

Word	Noun	Adjective	Verb	Adverb
allow	No	No	Yes	No
clear	Yes	Yes	Yes	Yes

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

allow (noun)	clear (noun)
	a clear or unobstructed space or expanse of land or water
	the state of being free of suspicion

allow (adjective)	clear (adjective)
	readily apparent to the mind
	allowing light to pass through
	free from clouds or mist or haze
	accurately stated or described
	free from confusion or doubt
	characterized by ease and quickness in perceiving
	clear and distinct to the senses; easily perceptible
	freed from any question of guilt
	easily deciphered
	clear of charges or deductions
	free from flaw or blemish or impurity
	(especially of a title) free from any encumbrance or limitation that presents a question of fact or law
	affording free passage or view
	free of restrictions or qualifications
	characterized by freedom from troubling thoughts (especially guilt)
	(of sound or color) free from anything that dulls or dims
	free from contact or proximity or connection

allow (verb)	clear (verb)
allow or plan for a certain possibility; concede the truth or validity of something	remove
give or assign a resource to a particular person or cause	rid of obstructions
consent to, give permission; permit	make clear, bright, light, or translucent
allow the presence of or allow (an activity) without opposing or prohibiting	free (the throat) by making a rasping sound
let have	make a way or path by removing objects
grant as a discount or in exchange	remove the occupants of
make it possible through a specific action or lack of action for something to happen	remove (people) from a building
allow the other (baseball) team to score	rid of instructions or data
make a possibility or provide opportunity for; permit to be attainable or cause to remain	make free from confusion or ambiguity; make clear
afford possibility	pronounce not guilty of criminal charges
	grant authorization or clearance for
	settle, as of a debt
	pass by, over, or under without making contact
	pass an inspection or receive authorization
	go away or disappear
	earn on some commercial or business transaction; earn as salary or wages
	yield as a net profit
	make as a net profit
	be debited and credited to the proper bank accounts
	sell to get rid of
	clear from impurities, blemishes, pollution, etc.
	free from payment of customs duties, as of a shipment
	go unchallenged; be approved
	become clear

allow (adverb)	clear (adverb)
	in an easily perceptible manner
	entirely