Synonyms of unimpressive

1 Syllable

plain, dull, fair

2 Syllables

prosaic, normal, modest, common, usual, so-so

3 Syllables

routine, typical, mediocre, second-rate, pedestrian

4 Syllables

commonplace, unexciting, conventional, average, everyday, uneventful, characterless, run-of-the-mill, uninspired

5 Syllables

insignificant, undistinguished, garden-variety, unexceptional, unremarkable, unmemorable, unnoteworthy