Yes, creep is a Scrabble word!

Verb

1. Move slowly; in the case of people or animals with the body near the ground

2. To go stealthily or furtively

3. Grow or spread, often in such a way as to cover (a surface)

4. Show submission or fear

Noun

1. Someone unpleasantly strange or eccentric

2. A slow longitudinal movement or deformation

3. A pen that is fenced so that young animals can enter but adults cannot

4. A slow mode of locomotion on hands and knees or dragging the body