| significant(adjective, good, clear, strong, show) |
| considerable(adjective, importance, heavy, important) |
| material(adjective, good, importance, heavy) |
| substantial(adjective, strong, importance, heavy) |
| important(adjective, good, strong, great, tough) |
| momentous(adjective, good, clear, strong, great) |
| relevant(adjective, clear, importance, significant) |
| weighty(adjective, good, clear, strong, great) |
| consequential(adjective, good, clear, importance) |
| serious(adjective, good, great, severe, extraordinary) |
| essential(adjective, importance, important, significant) |
| grave(adjective, dull, quiet, great, tough) |
| earnest(adjective, dull, quiet, severe, importance) |
| solemn(adjective, dull, quiet, severe, importance) |
| heavy(adjective, dull, quiet, tough, severe) |
| sober(adjective, dull, quiet, severe) |
| large(adjective, strong, important, significant) |
| solid(adjective, clear, strong, important) |
| worthwhile(adjective, strong, sensible, solid) |
| far-reaching(adjective, tough, severe, important) |