finger vs knuckle joint

finger and knuckle joint both are nouns.

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

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

finger (verb)	knuckle joint (verb)
indicate the fingering for the playing of musical scores for keyboard instruments
feel or handle with the fingers
search for on the computer
examine by touch