Yes, harp is a Scrabble word!

Verb

1. Come back to

2. Play the harp

Noun

1. A chordophone that has a triangular frame consisting of a sounding board and a pillar and a curved neck; the strings stretched between the neck and the soundbox are plucked with the fingers

2. A pair of curved vertical supports for a lampshade

3. A small rectangular free-reed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole