thereon (adverb) afterward/afterwards: following a time, event
Sinonime: a while later,
after, another time, at a later time,
behind, by and by, ensuingly,
eventually, in a while, intra,
late,
later, latterly,
next, on the next day, post hoc,
soon,
subsequently,
then, thereafter, thereon,
ultimatelyAntonime: beforehand