fingerprint vs smudge

fingerprint and smudge both are nouns.

Word	Noun	Adjective	Verb	Adverb
fingerprint	Yes	No	Yes	No
smudge	Yes	No	Yes	No

As nouns, smudge is a hypernym of fingerprint; that is, smudge is a word with a broader meaning than fingerprint:

Other hypernyms of fingerprint include blot, daub, slur, smear, smirch, spot.

fingerprint (noun)	smudge (noun)
a smudge made by a (dirty) finger	a blemish made by dirt
a generic term for any identifying characteristic	a smoky fire to drive away insects
a print made by an impression of the ridges in the skin of a finger; often used for biometric identification in criminal investigations

fingerprint (verb)	smudge (verb)
take an impression of a person's fingerprints	make a smudge on; soil by smudging