Build up and Mark up

Build up verb - To become greater in extent, volume, amount, or number.

Mark up and build up are semantically related In some cases you can use "Mark up" instead a verb "Build up".

Mark up verb - Increase the price of.

Build up and mark up are semantically related in increase topic. Sometimes you can use "Build up" instead a verb "Mark up", if it concerns topics such as add or grow.