finger vs knuckle

finger and knuckle both are nouns.

Word	Noun	Adjective	Verb	Adverb
finger	Yes	No	Yes	No
knuckle	Yes	No	Yes	No

finger (noun)	knuckle (noun)
one of the parts of a glove that provides covering for a finger or thumb	a joint of a finger when the fist is closed
any of the terminal members of the hand (sometimes excepting the thumb)
the length of breadth of a finger used as a linear measure

finger (verb)	knuckle (verb)
indicate the fingering for the playing of musical scores for keyboard instruments	press or rub with the knuckles
feel or handle with the fingers	shoot a marble while keeping one's knuckles on the ground
search for on the computer
examine by touch