I. noun
1.
Synonyms: supremacy , ascendancy, dominance, domination, dominion, masterdom, preeminence, preponderance, prepotence, sovereignty
2.
Synonyms: ancestor 1, antecedent(s), forebear, forefather, primogenitor, progenitor
Related Word: forerunner, precursor, predecessor
Antonyms: descendant
II. adjective
Synonyms: dominant 1, master, overbearing, paramount, predominant, predominate, preponderant, prevalent, regnant, sovereign