Catch up and Creep up

Catch up verb - To catch or hold as if in a net.

Creep up and catch up are semantically related in come nearer topic. In some cases you can use "Creep up" instead a verb "Catch up".

Creep up verb - Advance stealthily or unnoticed.

Catch up and creep up are semantically related in come nearer topic. You can use "Catch up" instead a verb "Creep up".