Nouns

(n)fingerprinta print made by an impression of the ridges in the skin of a finger; often used for biometric identification in criminal investigations
(n)fingerprinta generic term for any identifying characteristic“that tax bill had the senator's fingerprints all over it”
(n)fingermark, fingerprinta smudge made by a (dirty) finger

Verbs

(v)fingerprinttake an impression of a person's fingerprints