All so-so synonyms

adj so-so

• respectable — worthy of respect or esteem; estimable; worthy: a respectable citizen.
• mediocre — of only ordinary or moderate quality; neither good nor bad; barely adequate: The car gets only mediocre mileage, but it's fun to drive. Synonyms: undistinguished, commonplace, pedestrian, everyday; run-of-the-mill. Antonyms: extraordinary, superior, uncommon, incomparable.
• passable — capable of being passed through, beyond, or over; fit to be traversed, penetrated, crossed, etc., as a road, forest, or stream.
• undistinguished — having no distinguishing marks or features.
• middling — equally distant from the extremes or outer limits; central: the middle point of a line; the middle singer in a trio.
• adequate — If something is adequate, there is enough of it or it is good enough to be used or accepted.
• average — An average is the result that you get when you add two or more numbers together and divide the total by the number of numbers you added together.
• fair — free from bias, dishonesty, or injustice: a fair decision; a fair judge.
• fair to middling — free from bias, dishonesty, or injustice: a fair decision; a fair judge.
• indifferent — without interest or concern; not caring; apathetic: his indifferent attitude toward the suffering of others.
• medium — a middle state or condition; mean.
• moderate — kept or keeping within reasonable or proper limits; not extreme, excessive, or intense: a moderate price.
• okay — to put one's endorsement on or indicate one's approval of (a request, piece of copy, bank check, etc.); authorize; initial: Would you OK my application?
• ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
• run-of-the-mill — merely average; commonplace; mediocre: just a plain, run-of-the-mill house; a run-of-the-mill performance.
• tolerable — capable of being tolerated; endurable: His arrogance is no longer tolerable.
• fairish — moderately good, large, or well: a fairish income.
• not bad — not good in any manner or degree.