What is another word for "denominator"?

Roget's Thesaurus (1911) lists these synonyms for "denominator": all, another, average, balance, common, commonplace, compromise, course, difference, for, generality, golden, intermediate, least, long, mean, median, mediocre, mediocrity, medium, middle, mode, neutral, neutrality, numbers, off, one, pair, reduce, round, run, split, state, strike, take, taking, the, together, with.