轟く[todoroku] to roar
轟然[gouzen] roaring
轟轟[todorotodoro] thunderous
轟沈[gouchin] sinking a ship instantly

轟音[gouon] thunderous roar
轟き[todoroki] roar
轟かす[todorokasu] to make a thundering sound
爆轟[bakugou] detonation

ト音記号[toonkigou] G clef
ハ音記号[haonkigou] C clef
ヘ音記号[heonkigou] F clef
哀音[aion] sad voices
異音[ion] allophone

異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
一音節[ichionsetsu] monosyllable
一口同音[ikkudouon] reading in unison
羽音[haoto] sound of flapping wings (of a bird)