quite vs quite a

quite and quite a both are adverbs.

Word	Noun	Adjective	Verb	Adverb
quite	No	No	No	Yes
quite a	No	No	No	Yes

As adverbs, quite and quite a are synonyms defined as:

quite and quite a: of an unusually noticeable or exceptional or remarkable kind (not used with a negative)

Other synonyms of quite include quite an.

quite (adverb)	quite a (adverb)
to the greatest extent; completely	of an unusually noticeable or exceptional or remarkable kind (not used with a negative)
to a degree (not used with a negative)
of an unusually noticeable or exceptional or remarkable kind (not used with a negative)
actually or truly or to an extreme