2
irreversible(adjective, irrevocable)
2
kaput
2
lifeless(adjective, dead)
2
lonely
2
long-lost
2
loss
2
lost to sight(expression, idiom)
2
mooning(adjective, careless, remote, vague, distracted)
2
mysterious(unknown, alien)
2
napping
2
no more(expression, split, away, lacking, finished)
2
off-course(adjective, missing, strayed)
2
out-of-date(adjective, dead, past, previous, obsolete)
2
perished(adjective, destroyed, extinct, inexistence)
2
removed(adjective, split, quit, careless, apathetic)
2
scattered
2
spout
2
strange(adjective, mysterious, unknown, foreign, alien)
2
unaware(adjective, distant, ignorant, distracted, absorbed)
2
unconnected
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APASmart Define. (2016). lost thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/lost/thesaurus/synonyms
ChicagoSmart Define. 2016. "lost thesaurus" https://smartdefine.org/lost/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, lost thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/lost/thesaurus/synonyms>.
MLASmart Define. "lost thesaurus" 17 February 2016. Web. 21 September 2026. <https://smartdefine.org/lost/thesaurus/synonyms>