thumb nut thumbnut • thumb pad · · · Info · Definitions · Synonyms · Characters · · thumb nut · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) a threaded nut with winglike projections for thumb and forefinger leverage in turning. Synonyms: wing nut, wing-nut, wing screw, butterfly nut, thumbnut. · · Noun Definition 1 Synonyms · · · wing nut · · Synonym 1 wing-nut · · Synonym 2 wing screw · · Synonym 3 butterfly nut · · Synonym 4 thumbnut · · Synonym 5 Characters · · space U+0020 b latin small letter b U+0062 h latin small letter h U+0068 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074 u latin small letter u U+0075