Yes, markup is a Scrabble word!

...and is worth 14 points in Scrabble, and 17 points in Words with Friends

markup

Noun

1. The amount added to the cost to determine the asking price

2. Detailed stylistic instructions for typesetting something that is to be printed; manual markup is usually written on the copy (e.g. underlining words that are to be set in italics)

What Scrabble words can I make with the letters in markup?

4 Letter Words

arum
mark
mura
murk
park
pram
prau
puma
raku
ramp
rump

Search for more Scrabble words

Words that can be created with an extra letter added to markup:

S:markupsG:pugmark