on a line

matched

aligned calm common constant equivalent even exact flat flush horizontal leveled like matching parallel plain plane planed polished regular rolled same stable steady straight trim trimmed uniform

akin alike commensurate comparable consistent continuous equable identical in line lined up of same height on a par on one plane planate precise proportionate unbroken unfluctuating uninterrupted

dissimilar divergent imbalanced inconsistent irregular rough uneven unstable unsteady variable wavering wobbly

ragged