The antonyms for the word "more innumerous" are "many," "numerous," "countless," and "abundant." These antonyms refer to an ample or extensive amount of something, contrasting the idea of being few or scarce. The opposite of "more innumerous" can also be expressed as "finite," "limited," or "scarce," which are words that suggest a constraint on the quantity or availability of something. In essence, the antonyms for "more innumerous" describe a situation or circumstance where there is a profusion or abundance of something, either in terms of numbers or quantity.