Yes, pulse is a Scrabble word!

Verb

1. Expand and contract rhythmically; beat rhythmically

2. Produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses

3. Drive by or as if by pulsation

Noun

1. (electronics) a sharp transient wave in the normal electrical state (or a series of such transients)

2. The rhythmic contraction and expansion of the arteries with each beat of the heart

3. The rate at which the heart beats; usually measured to obtain a quick evaluation of a person's health

4. Edible seeds of various pod-bearing plants (peas or beans or lentils etc.)