fingernail vs finger

fingernail and finger both are nouns.

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

fingernail (noun)	finger (noun)
the nail at the end of a finger	one of the parts of a glove that provides covering for a finger or thumb
	any of the terminal members of the hand (sometimes excepting the thumb)
	the length of breadth of a finger used as a linear measure

fingernail (verb)	finger (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