| in tune(expression, adjective, pleasant, sweet, agreeable) |
| peaceful(adjective, sweet, agreeable, sympathetic, suitable) |
| pitch(noun, sound, tone) |
| sonorous(adjective, pleasant, sweet, agreeable, sympathetic) |
| timbre(noun, adjective, sound) |
| appealing |
| compatible(adjective, sweet, agreeable, sympathetic, suitable) |
| harmonics(noun, sound, pitch) |
| in chorus(expression, adjective, sweet, agreeable, sympathetic) |
| in concert(expression, adjective, sweet, agreeable, sympathetic) |
| in unison(expression, adjective, sweet, agreeable, sympathetic) |
| overtone |
| sweet-sounding(adjective, pleasant, sweet, agreeable, sympathetic) |
| tonal |
| according |
| acoustic |
| amicable(adjective, sweet, agreeable, sympathetic, suitable) |
| assonant(adjective, clear, harmonious, musical, tuneful) |
| blending(adjective, harmonious, melodious, melodic, vocal) |
| chiming(adjective, harmonious, melodious, melodic, vocal) |