| substantial(adjective, strain, firmness, labour, hardiness) |
| tenable(adjective, sound, strain, sensible, rational) |
| tolerant(adjective, sound, strain, sensible, rational) |
| long-standing(adjective, strain, firmness, labour, hardiness) |
| sustained(adjective, strain, firmness, persistent, continuous) |
| well-balanced(adjective, strain, firmness, even, labour) |
| uniform(adjective, calm, close, smooth, right) |
| consonant(adjective, good, close, cool, kind) |
| unchanging(adjective, calm, change, smooth, right) |
| coherent(adjective, clear, sound, reasonable, agreement) |
| unvarying(adjective, calm, smooth, right, flat) |
| even(adjective, adverb, calm, smooth, flat) |
| homogeneous(adjective, solid, steady, stable, regular) |
| ordered(adjective, smooth, perfect, ordinary, usual) |
| compatible(adjective, close, cool, agree, pleasant) |
| regular(adjective, calm, smooth, right, reasonable) |
| same(adjective, calm, good, close, change) |
| congruous(adjective, cool, agree, pleasant, friendly) |
| harmonious(adjective, agree, pleasant, friendly, appropriate) |
| orderly(adjective, calm, sound, smooth, agreeable) |