6 entries under concept topic. ×

6
time machine(expression, time, travel, theory)
5
forward time travel(expression, time, travel, theory)
4
backward time travel(expression, time, travel, theory)
4
hypothetical device(expression, science, device, machine)
3
vehicle(noun, science, device, machine)
2
one-way time travel(expression, time, travel, theory)
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APASmart Define. (-0001). time travel thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/time_travel/thesaurus/narrower
ChicagoSmart Define. -0001. "time travel thesaurus" https://smartdefine.org/time_travel/thesaurus/narrower (accessed September 28, 2026).
HarvardSmart Define -0001, time travel thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/time_travel/thesaurus/narrower>.
MLASmart Define. "time travel thesaurus" 30 November -0001. Web. 28 September 2026. <https://smartdefine.org/time_travel/thesaurus/narrower>