We don't have synonyms for markup yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mark up, mark-up and markus.
(n) :
the notation that is used to indicate how text should be displayed; the percentage or amount by which a seller hikes up his buy-in price when determining his selling price
"you don't make much money selling gas because the markup is so low."
(n) :
the notation that is used to indicate how text should be displayed; the percentage or amount by which a seller hikes up his buy-in price when determining his selling price
"you don't make much money selling gas because the markup is so low."