We found 3 dictionaries that define the word willow oaks:

General (3 matching dictionaries)

1. willow oaks: Merriam-Webster
2. willow oaks: Vocabulary.com
3. willow oaks: Wiktionary

(Note: See willow_oak as well.)

Definitions from Wiktionary (willow oak) ▸ noun:  Quercus phellos ▸ Also see willow_oak ▸ Words similar to willow oaks ▸ Usage examples for willow oaks ▸ Idioms related to willow oaks ▸ Wikipedia articles (New!) ▸ Words that often appear near willow oaks ▸ Rhymes of willow oaks ▸ Invented words related to willow oaks