Synonyms|0Antonyms|0|Broader|2Narrower|54Related|790

54 entries under entity topic. ×

3
perpetual motion(noun, expression, concept, proposition)
3
space elevator(noun, expression, concept, proposition)
3
Bussard ramjet(noun, expression, concept, proposition)
3
Dyson-Harrop satellite(noun, expression, concept, proposition)
3
Dyson sphere(noun, expression, concept, proposition)
3
Stanford torus(noun, expression, concept, proposition)
3
White-Juday warp-field interferometer(noun, expression, concept, proposition)
3
Woodward effect(noun, expression, concept, proposition)
3
alcubierre drive(noun, expression, concept, proposition)
3
artificial general intelligence(noun, expression, concept, proposition)
3
artificial uterus(noun, expression, concept, proposition)
3
brain in a vat(noun, expression, concept, proposition)
3
cloaking device(noun, expression, concept, proposition)
3
dean drive(noun, expression, concept, proposition)
3
digital immortality(noun, expression, concept, proposition)
3
exoskeletal engine(noun, expression, concept, proposition)
3
field propulsion(noun, expression, concept, proposition)
3
fusion rocket(noun, expression, concept, proposition)
3
gravitational shielding(noun, expression, concept, proposition)
3
gravity-vacuum transit(noun, expression, concept, proposition)
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APASmart Define. (1970). hypothetical technology thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/hypothetical_technology/thesaurus/narrower
ChicagoSmart Define. 1970. "hypothetical technology thesaurus" https://smartdefine.org/hypothetical_technology/thesaurus/narrower (accessed September 23, 2026).
HarvardSmart Define 1970, hypothetical technology thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/hypothetical_technology/thesaurus/narrower>.
MLASmart Define. "hypothetical technology thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/hypothetical_technology/thesaurus/narrower>