choose vs pick out

choose and pick out both are verbs.

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

As verbs, choose and pick out are synonyms defined as:

choose and pick out: pick out, select, or choose from a number of alternatives

Other synonyms of choose include select, take.

choose (verb)	pick out (verb)
pick out, select, or choose from a number of alternatives	pick out, select, or choose from a number of alternatives
see fit or proper to act in a certain way; decide to act in a certain way	detect with the senses
select as an alternative over another