different between approval vs willingness

English

approve +? -al

approval (countable and uncountable, plural approvals)

An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing, or event meets requirements.
An expression of favorable acceptance and encouragement; a compliment that also condones.
(especially philately) Something mailed by a seller to a collector to match their stated interests; the collector can approve of or return the item.

(expression granting permission or indicating agreement): approbation, sanction; See also Thesaurus:approval
(expression of favorable acceptance and encouragement): commendation; See also Thesaurus:praise

willing +? -ness

willingness (usually uncountable, plural willingnesses)

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