128 entries under adjective topic. ×

2
demised
2
idle(dull, cold, lifeless, nonliving)
2
insentient(dull, cold, lifeless, inanimate)
2
old-hat(dead, odd, old, primitive)
2
olden(dead, odd, old, past)
2
void(dead, obsolete)
1
dull(cold, lifeless, nonliving, inorganic)
1
moldy(dead, odd, out, old)
1
apathetic
1
belated(dead, past, lost, previous)
1
dead and gone(expression, idiom, dead, death)
1
demoded(odd, old, primitive, unfashionable)
1
died out(expression, missing, nonexistent, vanished)
1
disapproved(odd, old, primitive, unfashionable)
1
down memory lane(expression, idiom, dead, past)
1
erased
1
erstwhile(dead, past, lost, previous)
1
former(dead, late, past, lost)
1
in oblivion(expression, dead, past, lost)
1
indolent
10 years ago|11k views|share |citing 
APASmart Define. (2016). extinct thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extinct/thesaurus/synonyms
ChicagoSmart Define. 2016. "extinct thesaurus" https://smartdefine.org/extinct/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, extinct thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extinct/thesaurus/synonyms>.
MLASmart Define. "extinct thesaurus" 10 February 2016. Web. 21 September 2026. <https://smartdefine.org/extinct/thesaurus/synonyms>