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) material, stuff (the tangible substance that goes into the makeup of a physical object) "coal is a hard black material"; "wheat is the stuff they use to make bread"
S: (n) substance (the real physical matter of which a person or thing consists) "DNA is the substance of our genes"
S: (n) matter (that which has mass and occupies space) "physicists study both the nature of matter and the forces which govern it"
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) part, portion, component part, component, constituent (something determined in relation to something that includes it) "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
S: (n) relation (an abstraction belonging to or characteristic of two entities or parts together)
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"