There are several synonyms for the phrase "choose out" that can be used in different contexts. Some of the synonyms include select, pick, opt for, cherry-pick, elect, single out, discern, distinguish, and handpick. These words have similar meanings and can be used interchangeably depending on the situation and the message being conveyed. "Select" and "pick" are the most common synonyms for "choose out", especially when talking about making a choice between several options. "Opt for" and "elect" are often used in formal contexts, while "cherry-pick" and "handpick" are used when someone is carefully selecting the best option amongst many.