different between rollway vs rollaway

English

roll +? way

rollway (plural rollways)

An inclined slope or chute prepared for rolling logs into a stream or into a mill.
(rare) A series of cylindrical metal rolls placed between two rails and spaced apart, used to convey materials along a production line.
- 1917, "Equipment for Expediting Shell-Forging", The Iron Age 100 (4): 187
  Ingots that fully pass inspection are moved along the rollway to a point opposite to which they are to be piled, and then piled by means of a small magnet on an air hoist carried by a movable wall jib crane.

roll +? away

rollaway (not comparable)

Having wheels to allow for storage.
This rollaway bed goes under my main bed.

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