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/ˈɹeɪlbɛd/ · noun
The substructure of a railway, underlying the tracks; the roadbed of a railroad..
Holonyms: permanent way, right of way
Use railbed when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Railbed means The substructure of a railway, underlying the tracks; the roadbed of a railroad..
Common synonyms include trackbed.
The opposite depends on the specific sense.
Holonyms: permanent way, right of way
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