sounding line sounding lead • sounding machine · · · Info · Definitions · Synonyms · Characters · · sounding line · · Text Common · · Latin · · Scripts 13 · · Length Definitions · · · (noun) (nautical) plumb line for determining depth. Synonyms: lead line. · · Noun Definition 1 Synonyms · · · sound · · Synonym 1 go · · Synonym 2 voice · · Synonym 3 vocalize · · Synonym 4 vocalise · · Synonym 5 fathom · · Synonym 6 looking · · Synonym 7 sounding · · Synonym 8 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075