brightness vs cleverness

brightness and cleverness both are nouns.

Word	Noun	Adjective	Verb	Adverb
brightness	Yes	No	No	No
cleverness	Yes	No	No	No

As nouns, brightness and cleverness are synonyms defined as:

brightness and cleverness: intelligence as manifested in being quick and witty

Other synonyms of brightness include smartness.

brightness (noun)	cleverness (noun)
the location of a visual perception along a continuum from black to white	the property of being ingenious
the quality of being luminous; emitting or reflecting light	intelligence as manifested in being quick and witty
intelligence as manifested in being quick and witty	the power of creative imagination