S: (n) upper (piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot) "Uppers come in many styles"
S: (n) toe box (the forward tip of the upper of a shoe or boot that provides space and protection for the toes) "the toe box may be rounded or pointed"
S: (n) amphetamine, pep pill, upper, speed (a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression)
W: (adj) low [Indirect via high] (literal meanings; being at or having a relatively small elevation or upward extension) "low ceilings"; "low clouds"; "low hills"; "the sun is low"; "low furniture"; "a low bow"
S: (adj) upper (superior in rank or accomplishment) "the upper half of the class"