Prefer and Single out

Prefer verb - To show partiality toward.

Single out is a synonym for prefer in choose topic. In some cases you can use "Single out" instead a verb "Prefer", when it comes to topics like like better.

Single out verb - To decide to accept (someone or something) from a group of possibilities.

Prefer is a synonym for single out in pick topic. You can use "Prefer" instead a verb "Single out", if it concerns topics such as choose, buy, pick out for reason.