passable (adj.)
- acceptable
- accessible
- adequate
- admissible
- agreeable
- allowable
- alright
- attainable
- average
- decent
- dull
- fair
- fairish
- goodish
- indifferent
- insipid
- lackluster
- mediocre
- medium
- middling
- moderate
- modest
- namby-pamby
- navigable
- negotiable
- okay
- open
- presentable
- reachable
- respectable
- satisfactory
- so-so
- sufficient
- tedious
- tenable
- tidy
- tolerable
- traversable
- unexceptionable
- unexceptional
- unobjectionable
- unobstructed
- vapid
- viable
- wishy-washy
- workmanlike