clear vs allow

clear is a noun but allow is not a noun.

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

As verbs, allow is a hypernym of clear; that is, allow is a word with a broader meaning than clear:

Other hypernyms of clear include countenance, let, permit.

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

clear (adjective)	allow (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

clear (verb)	allow (verb)
remove	allow or plan for a certain possibility; concede the truth or validity of something
rid of obstructions	give or assign a resource to a particular person or cause
make clear, bright, light, or translucent	consent to, give permission; permit
free (the throat) by making a rasping sound	allow the presence of or allow (an activity) without opposing or prohibiting
make a way or path by removing objects	let have
remove the occupants of	grant as a discount or in exchange
remove (people) from a building	make it possible through a specific action or lack of action for something to happen
rid of instructions or data	allow the other (baseball) team to score
make free from confusion or ambiguity; make clear	make a possibility or provide opportunity for; permit to be attainable or cause to remain
pronounce not guilty of criminal charges	afford possibility
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

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