Synonyms for Across:

adj.

diametric (adjective)
converse, reverse, polar, inverse, Against, opposite, adversarial, diametric.

n.

along, apart, around, before, after, by, about. all-inclusive, all, complete, overall, the sum total, all-or-nothing, altogether, wholesale, whole, Everything. ahead, up, forward, direct, advancing, bound for something, oncoming, from all sides, Into. broad, fine, fat, elongated, attenuated, narrow, filmy, paper thin, hairline. across (noun)
crossed, decussate, crossways, crosstown, cross-town, intersecting, crosswise, over, intersectant.
crosswise (noun)
to the opposite side of, from one side to another, transversely, on the other side, in front of, beyond, directly opposite, in a crossing position, athwart, contrariwise, from side to side of, over against.

prep.

traversing a space, side to side (preposition)
crossed, crosswise, opposite, over, beyond, transversely, athwart.

Other synonyms:

advancing, hairline, fat, before, oncoming, beyond, paper thin, apart. after, direct, by, along, narrow, broad, up, ahead. Into, forward. fine. about. around. Other relevant words:
along, crossed, about, cross-town, overall, advancing, after, intersectant, fat, crossways, ahead, hairline, fine, whole, over, transversely, oncoming, athwart, Into, crosstown, complete, forward, broad, apart, direct, before, up, by, over against, altogether, all-or-nothing, all-inclusive, beyond, on the other side, all, wholesale, filmy, decussate, intersecting, Everything, in front of, contrariwise, crosswise, paper thin, elongated, attenuated, around, narrow.

Usage examples for across

  1. Miss Todd's path in life had brought her across more than one or two such. – The Bertrams by Anthony Trollope
  2. And he had called to her again across the road to wait for him. – The Romantic by May Sinclair