| 100% | CLARKKENT | 9 | Superman's secret identity: 2 wds. |
| 65% | DIANAPRINCE | 11 | 41-Across's secret identity (2 wds.) |
| 58% | LEXLUTHOR | 9 | Superman's archenemy: 2 wds. |
| 57% | KENT | 4 | Last name of Superman's secret identity |
| 56% | CLARKKENT | 9 | Superman's alter ego: 2 wds. |
| 54% | KENT | 4 | Clark ___ (Superman's secret identity) |
| 54% | CLARK | 5 | ___ Kent (Superman's secret identity) |
| 50% | HAIRDYE | 7 | Blonde's secret, maybe (2 wds.) |
| 50% | LOISLANE | 8 | Superman's gal (2 wds.) |
| 50% | LOISLANE | 8 | Superman's girlfriend (2 wds) |
| 49% | ONHER | 5 | "___ Majesty's Secret Service": 2 wds. |
| 46% | GREENCARD | 9 | Immigrant's US identity document: 2 wds. |
| 44% | BATMAN | 6 | Bruce Wayne's secret identity |
| 44% | WAYNE | 5 | Bruce ___ (Batman's secret identity) |
| 44% | KANE | 4 | Kate ___ (Batwoman's secret identity) |
| 44% | SUPERGIRL | 9 | Kara Danvers's secret identity |
| 44% | WAYNE | 5 | Bruce ___, Batman's secret identity |
| 44% | DIANAPRINCE | 11 | Wonder Woman's secret identity |
| 44% | WADE | 4 | ___ Wilson (Deadpool's secret identity) |
| 44% | PETER | 5 | ___ Parker (Spiderman's secret identity) |
| 44% | ONHER | 5 | "___ Majesty's Secret Service" (1969 James Bond film) (2 wds.) |
| 43% | HAL | 3 | ___ Jordan (Green Lantern's secret identity) |
| 43% | HAL | 3 | Green Lantern's secret identity ___ Jordan |
| 43% | DIANA | 5 | ___ Prince (Wonder Woman's secret identity) |
| 43% | WAYNE | 5 | "Bruce ___ is Batman's secret identity" |
| 43% | BATGIRL | 7 | Barbara Gordon's secret identity, in comics |
| 43% | ACASE | 5 | "It's ___ of mistaken identity": 2 wds. |
| 42% | ZORRO | 5 | Don Diego de la Vega's secret identity |
| 41% | PLANETKRYPTON | 13 | Birthplace of Superman: 2 wds. |
| 41% | INON | 4 | Let ___ a secret: 2 wds. |