sneak up sneak thief • sneak-up · · · Info · Definitions · Synonyms · Characters · · sneak up · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (verb) advance stealthily or unnoticed. Synonyms: creep up, sneak up. Example: "Age creeps up on you." · · Verb Definition 1 Synonyms · · · creep up · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 k latin small letter k U+006B n latin small letter n U+006E p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075