Yes, stray is a Scrabble word!

Verb

1. Move about aimlessly or without any destination, often in search of food or employment

2. Wander from a direct course or at random

3. Lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking

Adjective

1. Not close together in time

2. (of an animal) having no home or having wandered away from home

Noun

1. An animal that has strayed (especially a domestic animal)