Couchette is a see also of roomette.
As nouns the difference between couchette and roomette
is that couchette is a compartment on a passenger train having berths for sleeping while roomette is (us) a small private compartment, for one person, in a railroad sleeping car.
couchette
English
Noun
(
en noun)
A compartment on a passenger train having berths for sleeping.
A berth in such a compartment.
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roomette
English
Noun
(
en noun)
(US) A small private compartment, for one person, in a railroad sleeping car
See also
*couchette