flat Synonyms

monotone plane even uninteresting planar apartment boring smooth level dull categorical matte unexciting drab humdrum monotonous vapid lifeless depressed prostrate colorless bland still two-dimensional stale tame insipid straight lackluster all-out hootch bowling alley alluvial plain adamantly tops unqualified unimpassioned condo three-d condominium 2-dimensional 2d living quarters quarters achromic bowling green atonal walk-up apartment building boarding house