Synonyms for Crosswise (same or very similar meaning)
WordNet sense 1 (extending or lying across; in a crosswise direction; at right angles to the long axis):
cross, transverseWordNet sense 2 (parallel to or in the plane of the horizon or a base line):
horizontalWordNet sense 3 (transversely):
across, crosswaysFrom the ODE community, based on WordNetadd/edit