sleeper (n.)
- alcohol
- analgesic
- anodyne
- barb
- barbiturate
- blue
- boxcar
- caboose
- car
- carriage
- coach
- codeine
- depressant
- depressor
- diner
- dinghy
- dolly
- downer
- flat
- flatcar
- gondola
- goofball
- heroin
- hop
- horse
- hypnotic
- junk
- laudanum
- lie-abed
- liquor
- local
- lotus
- meperidine
- methadone
- morphia
- morphine
- narcotic
- opiate
- opium
- pacifier
- paregoric
- phenobarbital
- rainbow
- red
- reefer
- roomette
- scag
- sedative
- shit
- sleepwalker
- sleepyhead
- slugabed
- smack
- smoker
- somnambulist
- somniloquist
- soporific
- stockcar
- tank
- tar
- tender
- tranquilizer
- truck
- turps
- van
- waggon
- yellow
