G2812
κλέπτης
thief
κλέπτης, -ου, ὁ [in LXX for גַּנָּב ;] a thief: Mat.6:19-20 24:43, Luk.12:33, 39, Jhn.10:1, 10 12:6, 1Co.6:10, 1Pe.4:15. Fig., ὡς κ. ἐν νυκτί, 1Th.5:2 5:4 (κλέπτας, WH, txt., R, mg.; see Lft., Notes, 73; but cf. also M, Th., l.with), 2Pe.3:10, Rev.3:3 16:15. Metaphorical, of false teachers, Jhn.10:8.† SYN.: λῃστής, a robber, a brigand who plunders, openly, with violence; κ. is a thief who steals in secret, by fraud and cunning (Tr., Syn., § xliv) (AS)
The KJV translates G2812 in the following manner:
thief (24x), thieves (8x)
Full Thayer's lexicon entry
κλέπτης — kléptēs
κλέπτης, κλέπτου, ὁ (κλέπτω) (from Homer down), the Sept. for גַּנָּב, a thief: Mat 6:19; Mat 24:43; Luk 12:33; Luk 12:39; Joh 10:1; Joh 10:10; 1Co 6:10; 1Pe 4:15; an embezzler, pilferer, Joh 12:6; ἔρχεσθαι or ἥκειν... ὡς κλέπτης ἐν νυκτί, equivalent to to come unexpectedly, 1Th 5:2; 1Th 5:4; 2Pe 3:10; Rev 3:3; Rev 16:15; the name is transferred to false teachers, who do not care to instruct men, but abuse their confidence for their own gain, Joh 10:8. (Synonym: see λῃστής, at the end.)
16 occurrences
Matthew (3), Luke (2), John (4), I Corinthians (1), I Thessalonians (2), I Peter (1), II Peter (1), Revelation of John (2)