pick vs pick up

pick is a noun but pick up is not a noun.

Word	Noun	Adjective	Verb	Adverb
pick	Yes	No	Yes	No
pick up	No	No	Yes	No

pick (noun)	pick up (noun)
the act of choosing or selecting
a basketball maneuver; obstructing an opponent with one's body
a heavy iron tool with a wooden handle and a curved head that is pointed on both ends
a thin sharp implement used for removing unwanted material
the yarn woven across the warp yarn in weaving
a small thin device (of metal or plastic or ivory) used to pluck a stringed instrument
the person or thing chosen or selected
the best people or things in a group
the quantity of a crop that is harvested

pick (verb)	pick up (verb)
remove in small bits	gain or regain energy
remove unwanted substances from, such as feathers or pits	improve significantly; go from bad to good
select carefully from a group	lift out or reflect from a background
harass with constant criticism	get to know or become aware of, usually accidentally
eat intermittently; take small bites of	eat by pecking at, like a bird
hit lightly with a picking motion	take into custody
look for and gather	take up by hand
attack with or as if with a pickaxe of ice or rocky ground, for example	fill with high spirits; fill with optimism
pull lightly but sharply with a plucking motion	give a passenger or a hitchhiker a lift
provoke	take and lift upward
pay for something	perceive with the senses quickly, suddenly, or momentarily
pilfer or rob	register (perceptual input)
	buy casually or spontaneously
	gather or collect
	get in addition, as an increase
	meet someone for sexual purposes