Etymology
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booster (n.)
1890, "one who boosts" something, agent noun from boost (v.). Electrical sense is recorded from 1894. Young child's booster chair is attested under that name from 1957 (booster-seat is from 1956). Related: Boosterism (1914).
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rocket (n.2)

[self-propelling projectile] 1610s, "projectile consisting of a cylindrical tube of pasteboard filled with flammable or explosive matter," from Italian rocchetto "a rocket," literally "a bobbin," diminutive of rocca "a distaff," so called because of cylindrical shape. The Italian word probably is from a Germanic source (compare Old High German rocko "distaff," Middle Dutch rokke, Old Norse rokkr), from Proto-Germanic *rukkon- (from PIE root *rug- "fabric, spun yarn").

Originally of fireworks rockets, the meaning "device propelled by a rocket engine" is recorded by 1919 (Goddard); rocket-ship in the space-travel sense is attested from February 1927 ("Popular Science"); earlier as a type of naval warship firing projectiles. Rocket science in the figurative sense of "difficult, complex process or topic" is attested by 1985; rocket scientist is from 1952.

That such a feat is considered within the range of possibility is evidenced by the activities of scientists in Europe as well as in America. Two of them, Prof. Herman Oberth and Dr. Franz Hoeff, of Vienna, are constructing a five-ton rocket ship in which they hope to reach the moon in two days. [Popular Science, February 1927]
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rocket (n.1)

garden plant of the cabbage family, c. 1500, rokette, from French roquette (16c.), perhaps via Italian rochetta, diminutive of ruca "a kind of cabbage," from Latin eruca "colewort," perhaps so called for its downy stems and related to ericus "hedgehog," also "a beam set with spikes" (from PIE *ghers- "to bristle;" see horror).

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rocket (v.)

"fly straight up, spring like a rocket," 1860, from rocket (n.2). Earlier "to attack with rockets" (1799). Meaning "send up by a rocket" is from 1837. Related: Rocketed; rocketing.

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retro-rocket (n.)

1945, "anti-submarine weapon fired backward from an airplane at the same velocity as the plane" (so it falls straight down), from retro- + rocket (n.). By 1957 as an auxiliary rocket on a spacecraft to thrust forward and oppose the forward motion.

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rocketry (n.)

"science or use of rockets and rocket propulsion," 1930, from rocket (n.2) + -ry.

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thruster (n.)
type of rocket engine, 1962, agent noun; see thrust (n.).
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blast-off (n.)
"initial burst of energy that launches a rocket into space," 1950, from blast (v.) + off (adv.).
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rpg (n.)

by 1979, initialism (acronym) from role-playing game (see roleplay). As an initialism for rocket-propelled grenade, by 1970.

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skyrocket (n.)
1680s, type of firework, from sky (n.) + rocket (n.2). The verb, in the figurative sense of "to rise abruptly and rapidly" (often with suggestion of 'and then explode and vanish'") is attested from 1895.
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