| 100% | WANDA | 5 | Kurt Vonnegut's "Happy Birthday, ___ June" |
| 71% | WANDA | 5 | "Happy Birthday, ___ June" (Kurt Vonnegut Jr. novel) |
| 47% | WAR | 3 | Subject of Kurt Vonnegut's "Slaughterhouse-Five" |
| 46% | JEANLOUIS | 9 | Designed Marilyn Monroe's Happy Birthday gown |
| 45% | ICENINE | 7 | Crystallizing substance in Kurt Vonnegut's "Cat's Cradle" |
| 44% | JAILBIRD | 8 | Kurt Vonnegut's novel about a Watergate conspirator just released from prison |
| 44% | ELIOT | 5 | Rosewater of Kurt Vonnegut's "God Bless You, Mr. Rosewater" |
| 44% | CRADLECATS | 10 | Kurt Vonnegut novel about felines in a baby's bed? |
| 43% | ELIOT | 5 | Mr. Rosewater in Kurt Vonnegut's "God Bless You, Mr. Rosewater" |
| 42% | SLAUGHTERHOUSEFIVE | 18 | Kurt Vonnegut novel |
| 40% | JAILBIRD | 8 | Kurt Vonnegut novel about Watergate |
| 38% | HOCUSPOCUS | 10 | 1990 novel by Kurt Vonnegut |
| 38% | DEADEYEDICK | 11 | 1982 novel by Kurt Vonnegut |
| 38% | BLUEBEARD | 9 | 1987 novel by Kurt Vonnegut |
| 38% | SLAPSTICK | 9 | 1976 novel by Kurt Vonnegut |
| 38% | JAILBIRD | 8 | 1979 novel by Kurt Vonnegut |
| 37% | SIXTEEN | 7 | Happy Birthday Sweet __, a song by Neil Sedaka |
| 37% | CATSCRADLE | 10 | 1963 novel by Kurt Vonnegut, Jr |
| 37% | TITAN | 5 | "The Sirens of ___," Kurt Vonnegut novel |
| 36% | ELIOT | 5 | ___ Rosewater, recurring character in Kurt Vonnegut novels |
| 36% | PLAYER | 6 | & 24A 1952 novel by Kurt Vonnegut Jr |
| 36% | THESIRENS | 9 | & 16A 1959 novel by Kurt Vonnegut, Jr |
| 36% | CURIOSITY | 9 | Mars rover that can sing Happy Birthday |
| 35% | IND | 3 | Birthplace of Rex Stout and Kurt Vonnegut: Abbr. |
| 35% | POWS | 4 | John McCain and Kurt Vonnegut, once, for short |
| 35% | BLUEBEARD | 9 | French folktale that inspired a Kurt Vonnegut novel |
| 34% | MOTHERNIGHT | 11 | Nick Nolte movie based on a Kurt Vonnegut novel |
| 34% | ETS | 3 | Tralfamadorians in the work of Kurt Vonnegut, e.g. |
| 34% | CAKE | 4 | It may be iced for a happy birthday party |