| Extinct birds | 13 |
| Extinct birds of New Zealand | 28 |
| Extinct birds of North Atlantic | 31 |
| Extinct birds' assignment? | 30 |
| Extinct Brazilian group | 23 |
| Extinct Canadian bills | 22 |
| Extinct carnivore whose name means "different lizard" | 63 |
| Extinct carnivore, familiarly | 29 |
| Extinct cat | 11 |
| Extinct cousin of NATO | 22 |
| Extinct cousin of the kiwi | 26 |
| Extinct creature | 16 |
| Extinct creatures | 17 |
| Extinct deliveryman | 19 |
| Extinct diver | 13 |
| Extinct Dixie redstart? | 23 |
| Extinct duck-billed beast | 25 |
| Extinct dumb cluck | 18 |
| Extinct elephantlike animal | 27 |
| Extinct elephantlike mammal | 27 |
| Extinct emu-like bird | 21 |
| Extinct emu-like birds | 22 |
| Extinct European wild ox | 24 |
| Extinct fliers | 14 |
| Extinct flightless bird | 23 |
| Extinct flightless bird of N.Z. | 31 |
| Extinct flightless birds | 24 |
| Extinct flock | 13 |
| Extinct German ox | 17 |
| Extinct gridiron org. | 21 |
| Extinct Hawaiian birds | 22 |
| Extinct herbivore of New Zealand | 32 |
| Extinct honey eaters | 20 |
| Extinct Indian group | 20 |
| Extinct Indo-European language | 30 |
| Extinct kin of the kiwi | 23 |
| Extinct kiwi cousin | 19 |
| Extinct kiwi kin | 16 |
| Extinct kiwi relative | 21 |
| Extinct kiwi relatives | 22 |
| Extinct language | 16 |
| Extinct language from Roman times | 33 |
| Extinct magazine | 16 |
| Extinct mammal | 14 |
| Extinct Mauritian | 17 |
| Extinct Mauritian birds | 23 |
| Extinct Mauritius birds | 23 |
| Extinct measure for a roll of cloth? | 36 |
| Extinct meat-eater, for short | 29 |
| Extinct N.Z. bird | 17 |
| Extinct N.Z. birds | 18 |
| Extinct New Zealand bird | 24 |
| Extinct New Zealand birds | 25 |
| Extinct New Zealand ratite | 26 |
| Extinct New Zealander | 21 |
| Extinct New Zealanders | 22 |
| Extinct North American bird | 27 |
| Extinct northerner | 18 |
| Extinct NZ bird | 15 |
| Extinct Ohio-N.Y. group | 23 |
| Extinct ostrich relative | 24 |
| Extinct ostrich relatives | 25 |
| Extinct ostrich-like bird | 25 |
| Extinct ostrichlike bird | 24 |
| Extinct ostrichlike birds | 25 |
| Extinct ox | 10 |
| Extinct people of Brazil | 24 |
| Extinct pigeon relative | 23 |
| Extinct pigeon relatives, redundantly | 37 |
| Extinct plant-eater | 19 |
| Extinct ratite | 14 |
| Extinct ratite bird | 19 |
| Extinct red giant | 17 |
| Extinct relative of NATO | 24 |
| Extinct relative of the emu | 27 |
| Extinct relative of the kiwi | 28 |
| Extinct relative of the ostrich | 31 |
| Extinct relatives of ostriches | 30 |
| Extinct reptiles | 16 |
| Extinct tribe | 13 |
| Extinct tusked beasts | 21 |
| Extinct tusked mammal | 21 |
| Extinct TV horse | 16 |
| Extinct volcano in Armenia | 26 |
| Extinct wild ox | 15 |
| Extinct wingless bird | 21 |
| Extinct, flightless bird | 24 |
| Extinct, flightless bird of New Zealand | 39 |
| Extinct, wingless bird of New Zealand | 37 |
| Extinct: Prefix | 15 |
| Extinction | 10 |
| Extinction exemplar | 19 |
| Extinguish | 10 |
| Extinguish (with "out") | 33 |
| Extinguish a candle (with "out") | 42 |
| Extinguish candles, in a way | 28 |
| Extinguish, as a fire | 21 |
| Extinguish, as a flame | 22 |
| Extinguish, as a light | 22 |
| Extinguish, as coals | 20 |