dulcet · crooner · whisper · sultry · buttery · rich · warm · baritone · melodic · gentle · soft · flowing · tender · seductive · calm · lullaby · velvety · purr
IDEA.org / Words / smooth voice
Related — velvet (Thick-pile textile); silky (Smooth and lustrous); mellow (Soft, ripe, relaxed); honeyed · soothing · dulcet · crooner · whisper · sultry · buttery · rich · warm · baritone
vocal texturesmooth voice ≠ rough voice Harsh, grating vocal quality; raspy voice · gravelly voice · hoarse voice · croaky voice
tonal qualitysmooth voice ≠ harsh voice Rough, abrasive vocal quality; squeaky voice
perceived effortsmooth voice ≠ strained voice Fatigued vocal cords; trembling voice
singing ability: tone deaf, pitch perfect, sing like a bird, hit the high notes, in tune
Word data: Linguabase (CC0) · www.idea.org/words/smooth_voice