ANT: Superstructure, superincumbency, top-weight, gravitation, extirpation, subverter, destroyer.
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KEY: Prop \v.\
SYN: Sustain, support, stay, maintain, [See SUPPORT].
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KEY: Propagate.
SYN: Breed, generate, produce, originate, spread, extend, expand, disseminate, diffuse, increase, multiply, promulgate, propound, broach.
ANT: Extinguish, strangle, stifle, neutralize, reduce, contract, suppress, diminish, fail, dwindle, die, contradict.
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KEY: Propel.