Yes, bird is a Scrabble word!

Verb

1. Watch and study birds in their natural habitat

Noun

1. Warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

2. The flesh of a bird or fowl (wild or domestic) used as food

3. Informal terms for a (young) woman

4. A cry or noise made to express displeasure or contempt

5. Badminton equipment consisting of a ball of cork or rubber with a crown of feathers