thereupon 1893 - epei {ep-i'}; from 1909 and 1487; {thereupon}, i.e. since (of time or cause): -- because, else, for that (then, -asmuch as), otherwise, seeing that, since, when.
thereupon 2026 - epoikodomeo {ep-oy-kod-om-eh'-o}; from 1909 and 3618; to build upon, i.e. (figuratively) to rear up: -- build thereon ({thereupon}, on, upon).