We don't have synonyms for mercator yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mediator, mercato and aerator.
(n) :
(chiefly attributive) An orthomorphic map projection, in which meridians appear at right-angles to the equator, and lines of latitude are horizontal lines whose distance from each other increases with distance from the equator.
(n) :
(chiefly attributive) An orthomorphic map projection, in which meridians appear at right-angles to the equator, and lines of latitude are horizontal lines whose distance from each other increases with distance from the equator.