| noticeable(adjective, unusual, important, exceptional, remarkable) |
| observable(adjective, unusual, important, exceptional, remarkable) |
| outstanding(adjective, great, unusual, important, exceptional) |
| patent(adjective, unusual, important, exceptional, remarkable) |
| pointed |
| popular(great, important, famous, outstanding, eminent) |
| portentous(adjective, big, heavy, substantial) |
| positive |
| prerequisite(important, essential, critical, basic, fundamental) |
| red-letter(adjective, unusual, important, exceptional, remarkable) |
| remarkable(adjective, unusual, important, exceptional, notable) |
| renowned(great, important, famous, outstanding, eminent) |
| required(important, essential, critical, basic, fundamental) |
| requisite(important, essential, critical, basic, fundamental) |
| respected(important, famous, popular, eminent, well-known) |
| serious(adjective, big, unusual, heavy, important) |
| sharpened(verb, intensified) |
| significant(adjective, big, unusual, heavy, important) |
| solemn(adjective, big, heavy, substantial) |
| something else(expression, adjective, unusual, important, exceptional) |