harp vs pick off

harp is a noun but pick off is not a noun.

Word	Noun	Adjective	Verb	Adverb
harp	Yes	No	Yes	No
pick off	No	No	Yes	No

harp (noun)	pick off (noun)
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
a pair of curved vertical supports for a lampshade
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

harp (verb)	pick off (verb)
come back to	pull or pull out sharply
play the harp	shoot one by one