The term 'willow' can be broken down into five crossword solutions: OSIER (5 letters), tree (4 letters), itea (4 letters), PUSSY (5 letters), and osler (5 letters). OSIER is a type of willow tree that is often used for basketry, while tree is a general term for a woody perennial plant. Itea is a genus of shrubs and small trees in the family Iteaceae, which includes willows. PUSSY willow is a common name for several species of willow with furry catkins, and osler is a type of willow tree native to Europe.