| Answer | Crossword Clue |
|---|---|
| SCARCER | More rare. |
| REDDER | More rare, as steak |
| PINKER | More rare, as steak |
| ONERS | They're more than rare |
| BLOODIER | More rare, in a way |
| DODO | Bird that's more than rare |
| TSAR | Ruler whose more common spelling is rare in crosswords |
| columbium | a rare element of the vanadium group, now more commonly called niobium |
| columbiums | COLUMBIUM, a rare element of the vanadium group, now more commonly called niobium |
