Split up and Single out

Split up verb - Separate into parts or portions.

Single out and split up are semantically related In some cases you can use "Single out" instead a verb "Split up".

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

Split up and single out are semantically related in isolate topic. Sometimes you can use "Split up" instead a verb "Single out", if it concerns topics such as discriminate and separate.