WordNet sense 1 (do something repeatedly and showing no intention to stop):

persist in

WordNet sense 2 (continue in a place, position, or situation):

remain, stay, stay on

WordNet sense 3 (span an interval of distance, space or time):

cover, extend

WordNet sense 4 (continue a certain state, condition, or activity):

keep, proceed, go on, go along

WordNet sense 5 (keep or maintain in unaltered condition; cause to remain or last):

preserve, uphold, carry on, bear on

WordNet sense 6 (allow to remain in a place or position):

retain, keep going, keep on

WordNet sense 7 (move ahead; travel onward in time or space):

go forward