Mark up and Tack on

Mark up verb - Increase the price of.

Tack on and mark up are semantically related in increase topic. In some cases you can use "Tack on" instead a verb "Mark up", when it comes to topics like add or grow.

Tack on verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.

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