Anthem, Array, Articulation, Ballad, Bank, Birdies, Boom, Booming, Bum, Burr, Buzz, Buzzing, Carol, Chain, Chaining, Chant, Chirp, Choir, Chorus, Concatenation, Connection, Whirring, Whistle, Whistles, Wow, Yodel, Continuum, Course, Croon, Crooning, Cycle, Descant, Descent, Distortion, Drone, Droning, Falter, Feedback, File, Flutter, Fluttering, Gamut, Gradation, Halt, Hem, Hesitate, Hissing, Howling, Hymn, Intonation, Intone, Lilt, Line, Lineage, Lyricism, Minstrel, Monotone, Pendulum, Periodicity, Persist, Pipe, Plenum, Prevail, Progression, Psalm, Purr, Purring, Quaver, Queue, Range, Rank, Recurrence, Reticulation, Rotation, Round, Routine, Row, Rumble, Run, Scale, Scat, Scratching, Sequence, Serenade, Series, Shake, Shredding, Sing, Singing, Song, Spectrum, Squeals, Stammer, Static, String, Stumble, Stutter, Succession, Thread, Thrum, Tier, Train, Tremolo, Trill, Troll, Twit, Twitter, Warble, Warbling, Whir