Dict: strongs - thereon
Strongs:
G1924 @ ἐπιγράφω epigraphō ep-ee-graf'-o From G1909 and G1125; to inscribe (physically or mentally): - inscription write in (over thereon).
G2026 @ ἐποικοδομέω epoikodomeō ep-oy-kod-om-eh'-o From G1909 and G3618; to build upon that is (figuratively) to rear up: - build thereon (thereupon on upon).