• rail bed

Fromrail +‎bed.

• IPA^(key):/ˈɹeɪlbɛd/

railbed (pluralrailbeds)

1. Thesubstructure of arailway, underlying thetracks; theroadbed of arailroad.

   Synonym:trackbed

   Holonyms:permanent way,right of way

• bedrail,brailed,driable,ridable