| one and only(adjective, expression, description, unique, characteristics) |
| out of this world(expression, adjective, extraordinary, unusual, unique) |
| curio(noun, unusual, find, unique, rear) |
| one in a million(expression, adjective, characteristic, unique, uncommon) |
| unique example(noun, adjective, extraordinary, unusual, rare) |
| very unique(expression, feature, attribute, characterization) |
| in class by itself(expression, idiom, special, rare, unique) |
| ne plus ultra(expression, idiom, unusual, rare, uncommon) |
| only(noun, feature, attribute, characterization, expression) |
| only one(noun, feature, attribute, characterization, expression) |
| only one of its kind(noun, feature, attribute, characterization, expression) |
| phenomenon(noun, unusual, abnormal, interesting) |
| unique object(noun, feature, attribute, characterization, expression) |
| unique person(noun, feature, attribute, characterization, expression) |
| unique thing(noun, feature, attribute, characterization, expression) |
| very special(expression, feature, attribute, characterization) |
| once in a lifetime |
| very unusual(expression, feature, attribute, characterization) |
| with no equal(expression, feature, attribute, characterization) |
| without equals(expression, special, rare, unique) |