undistinguished (adj.)

• alike
• common
• commonplace
• everyday
• homely
• homespun
• humble
• indifferent
• indiscernible
• indistinct
• indistinguishable
• inglorious
• innocuous
• interchangeable
• least
• low
• lowest
• lowly
• mean
• mediocre
• middling
• modest
• nameless
• obscure
• ordinary
• pedestrian
• plain
• poor
• prosaic
• run-of-the-mill
• simple
• small
• standard
• stereotyped
• teachable
• undifferentiated
• undistinguishable
• unexceptional
• unexciting
• unheard-of
• uniform
• unimportant
• unimpressive
• unknown
• unnoted
• unnoticed
• unpopular
• unpretentious
• unremarkable
• unremarked
• unsung