uppers

(noun) the higher of two berths. Synonyms: upper berth, upper.

(noun) piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot. Synonyms: upper. Example: "Uppers come in many styles."

(noun) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression. Synonyms: amphetamine, pep pill, upper, speed.