Yes, litter is a Scrabble word!

Verb

1. Strew

2. Make a place messy by strewing garbage around

3. Give birth to a litter of animals

Noun

1. The offspring at one birth of a multiparous mammal

2. Rubbish carelessly dropped or left about (especially in public places)

3. Conveyance consisting of a chair or bed carried on two poles by bearers

4. Material used to provide a bed for animals