| mature(verb, adjective, develop, smooth, progress) |
| soft(adjective, calm, quiet, clear, weak) |
| smooth(verb, adjective, calm, quiet, cool) |
| ripen(verb, advance, develop, progress, perfect) |
| rich(adjective, moist, strong, sound, smooth) |
| gentle(adjective, calm, control, person, quiet) |
| dulcet(noun, adjective, quiet, clear, strong) |
| mellifluous(adjective, quiet, clear, strong, smooth) |
| pleasant(adjective, calm, person, cool, kind) |
| sweet(adjective, moist, quiet, clear, smooth) |
| kind(noun, adjective, person, understanding, soft) |
| genial(adjective, calm, person, close, weak) |
| ripe(verb, adjective, smooth, warm, relax) |
| good-natured(adjective, close, kind, soft, pleasant) |
| mollify(verb, calm, reduce, cool, ease) |
| age(noun, verb, advance, develop, progress) |
| aged(adjective, sound, smooth, warm, ready) |
| develop(verb, advance, progress, perfect, relax) |
| melodious(adjective, quiet, smooth, pleasant, warm) |
| soften(verb, calm, control, beat, check) |