Synonyms for Overwhelming (same or very similar meaning)
WordNet sense 1 (so strong as to be irresistible):
overpoweringWordNet sense 2 (impossible to resist; overpowering):
irresistible, resistlessWordNet sense 3 (very intense):
consumingWordNet sense 4 (in an extreme degree):
intenseFrom the ODE community, based on WordNetadd/edit