Yes, dipper is a Scrabble word!

Noun

1. A ladle that has a cup with a long handle

2. A cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris

3. A group of seven bright stars in the constellation Ursa Major

4. Small North American diving duck; males have bushy head plumage

5. Small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom