Gartner rhymes with:
cartner, hartner, partner, baumgartner, bortner, cartner, copartner, cortner, fortner, gaertner, hangartner, hartner, kindergartner, mortner, ortner, partner, portner, weingartner
Gartner sounds like:
gaertner, gardener, gardenhire, gardiner, gardinier, gardner, gartmore, gertner, girdner, gordinier, gordner, gurtner