assign vs pick out

assign and pick out both are verbs.

Word	Noun	Adjective	Verb	Adverb
assign	No	No	Yes	No
pick out	No	No	Yes	No

As verbs, pick out is a hypernym of assign; that is, pick out is a word with a broader meaning than assign:

Other hypernyms of assign include choose, select, take.

assign (verb)	pick out (verb)
select something or someone for a specific purpose	pick out, select, or choose from a number of alternatives
attribute or credit to	detect with the senses
decide as to where something belongs in a scheme
attribute or give
transfer one's right to
give out
make undue claims to having
give an assignment to (a person) to a post, or assign a task to (a person)