Synonyms for On:

adj.

near (adjective)
near, Beside, bordering.

adv.

in contact; ahead of (adverb)
near, forward, touching, Upon, above, next, covering, approaching, at, onward, Toward, Beside, Against, about.

n.

concerned, regarding, concerning, devoted, as for, in connection with something, in/with regard to, in relation to. apart, after, before, around, across, next, Against, by, beyond. detox, carnivore, proceeding, crash diet, approaching, diet, cannibalism, at, cannibal, moving, brown-bag, Atkins diet, Toward, abstemious. complete, the sum total, wholesale, all-inclusive, whole, all, all-or-nothing, Everything, overall, altogether. acting, in, dark, dramatic, opposite, rep, method acting, go up. Than, relatively, next to, Whereas, relative, seen against something, the... the..., compared with/to, by/in contrast. come-on, transmit, screen, break, run, beam, televise, show, report, broadcast. here, when, last, sometime, This, Until, Whenever, then. 999, 900 number, 1800 number, 411, 1471, 0, 800 number, 190 number, 0800 number, 911. clad, bespectacled, cross dressing, clothed, attired, debonair, Corseted, dashing, dapper. energy, coal-fired, gas, burn, fuel, biomass, biogas, biofuel, fossil fuel, capacity. sell-by date, the last minute, closing date, due, timing, deadline, sunset provision, play date, time limit, due date. contraindication, injection, dosage, dose, Medicated, o.d., Narcotics, drug. and so forth (noun)
also, in addition.
forward (noun)
forward, onward, ahead.
up on (noun)
covering, underneath, above, under, Upon, touching, about.

Other synonyms:

contraindication, dosage, method acting, opposite, deplane, embark. acting, dark, Medicated, Against, by, dramatic. drug, rep, dose. go up, injection. transfer, in, board, change. get on. catch. concerning
about.
position
at.

Usage examples for on

  1. " Go on said the king again. – Berlin and Sans-Souci by Louise Muhlbach
  2. Come on here, I tell you! – The Bondboy by George W. (George Washington) Ogden
  3. " No, I shall not go on – The Bertrams by Anthony Trollope