digit vs digital

digit is a noun but digital is not a noun.

Word	Noun	Adjective	Verb	Adverb
digit	Yes	No	No	No
digital	No	Yes	No	No

digit (noun)	digital (noun)
a finger or toe in human beings or corresponding body part in other vertebrates
one of the elements that collectively form a system of numeration
the length of breadth of a finger used as a linear measure

digit (adjective)	digital (adjective)
	of a circuit or device that represents magnitudes in digits
	relating to or performed with the fingers
	displaying numbers rather than scale positions