Yes, stress is a Scrabble word!

Verb

1. To stress, single out as important

2. Put stress on; utter with an accent

3. Test the limits of

Noun

1. The relative prominence of a syllable or musical note (especially with regard to stress or pitch)

2. (psychology) a state of mental or emotional strain or suspense

3. Special emphasis attached to something

4. Difficulty that causes worry or emotional tension

5. (physics) force that produces strain on a physical body