Yes, crests is a Scrabble word!

Verb

1. Lie at the top of

2. Reach a high point

Noun

1. The top line of a hill, mountain, or wave

2. The top or extreme point of something (usually a mountain or hill)

3. The center of a cambered road

4. (heraldry) in medieval times, an emblem used to decorate a helmet

5. A showy growth of e.g. feathers or skin on the head of a bird or other animal