| 100% | GILA | 4 | ___ monster (lizard named for a US river) |
| 64% | GILA | 4 | River for which a “monstrous” lizard is named |
| 60% | NILE | 4 | Shade of green named for a river |
| 60% | GENESEE | 7 | Brewery named for a New York river |
| 60% | OHIO | 4 | State that was named for a river |
| 59% | TACOMA | 6 | Toyota pickup named for a U.S. city |
| 59% | TEDDY | 5 | Toy bear named for a U.S. president |
| 59% | TEJANO | 6 | Music genre named for a U.S. state |
| 59% | MILHOUSE | 8 | "The Simpsons" character named for a U.S. president |
| 58% | EBOLA | 5 | Virus named for a river |
| 58% | NILEBLUE | 8 | Color named for a river |
| 58% | STYX | 4 | Band named for a river |
| 58% | JFK | 3 | New York City airport named for a US president: Abbr. |
| 58% | ISUZU | 5 | Japanese car named for a river |
| 58% | IGGY | 4 | Apt name for a pet lizard |
| 57% | HYDRAS | 6 | Jellyfish relatives named for a mythological monster |
| 57% | HYDRAS | 6 | Sea creatures named for a mythical monster |
| 57% | THAMESHOUSE | 11 | MI5 headquarters named for a London river |
| 57% | AMSTEL | 6 | Beer brand named for a Dutch river |
| 57% | AMSTEL | 6 | Beer brewery named for a Dutch river |
| 57% | IGGY | 4 | Apt name for a pet Mexican lizard |
| 57% | IGGY | 4 | Apt name for a Mexican pet lizard |
| 56% | AVON | 4 | Massachusetts town named for a river in England |
| 56% | SAARLAND | 8 | German state named for a river, with "the" |
| 56% | EBOLA | 5 | Viral disease named for a river in Africa |
| 56% | AMSTEL | 6 | Brewery named for a Dutch river |
| 56% | AMSTEL | 6 | Beverage named for a Dutch river |
| 56% | ISUZU | 5 | Vehicle named for a Japanese river |
| 56% | AMSTEL | 6 | Brew named for a Dutch river |
| 56% | OSAGE | 5 | River named for a Plains tribe |