2
insentient(adjective, dull, cold, lifeless, inanimate)
2
missing(split, negative, away, lacking, finished)
2
of old(expression, dead, odd, old, past)
2
old-hat(adjective, dead, odd, old, primitive)
2
old-time(dead, odd, old, past, lost)
2
olden(adjective, dead, odd, old, past)
2
oldfangled(dead, odd, old, past, lost)
2
out of style(expression, idiom, odd, old, primitive)
2
put out
2
run out(verb, phrasal verb, the past)
2
spiritless(dull, cold, lifeless, late, asleep)
2
unfashionable(dead, odd, out, old, primitive)
2
void(adjective, dead, obsolete)
1
abeyant
1
destroyed
1
done(split, away, lacking, finished, absent)
1
down the drain(expression, idiom, split, lacking, finished)
1
dull(adjective, cold, lifeless, nonliving, inorganic)
1
moldy(adjective, dead, odd, out, old)
1
AWOL(split, away, lacking, finished, absent)
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APASmart Define. (2016). extinct thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extinct/thesaurus/synonyms
ChicagoSmart Define. 2016. "extinct thesaurus" https://smartdefine.org/extinct/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, extinct thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extinct/thesaurus/synonyms>.
MLASmart Define. "extinct thesaurus" 10 February 2016. Web. 20 September 2026. <https://smartdefine.org/extinct/thesaurus/synonyms>