24 synonyms for dominant such as authoritative, ascendant, and assertive. Dominant is an adjective, and its antonyms are subservient and submissive.
Ascendant, assertive, authoritative, bullish, commanding, controlling, domineering, feisty, forceful, governing, most influential, most powerful, not backward in coming forward, prepollent, prepotent, presiding, pushful, pushy, ruling, self-assured, self-possessed, superior, and supreme.