4
out(adjective, hard, odd, old, sour)
4
tacky(adjective, plain, cheap, tasteless, shabby)
3
ancient(adjective, dead, odd, old, past)
3
antediluvian(old, venerable, obsolete, antique, antiquated)
3
dull(adjective, hard, plain, dry, boring)
3
expired(adjective, feature, characteristic, trait)
3
hoary(adjective, flat, stupid, ordinary, dry)
3
olden(adjective, original, dead, odd, old)
3
unfashionable(adjective, last, original, odd, square)
3
unstylish(adjective, vulgar, odd, tasteless, wet)
3
worn-out(adjective, hard, flat, common, stupid)
2
belated(adjective, dead, past, lost, previous)
2
common(adjective, hard, flat, ordinary, dry)
2
corny(hard, tired, odd, old, sour)
2
dead(adjective, hard, flat, stupid, ordinary)
2
hackneyed(adjective, hard, flat, stupid, ordinary)
2
jejune(adjective, flat, stupid, ordinary, dry)
2
lost(adjective, dead, past, previous, obsolete)
2
moldy(odd, old, primitive, unfashionable, outdated)
2
moth-eaten(adjective, hard, last, original, tired)
11 years ago|7.6k views|share |citing 
APASmart Define. (2015). out-of-date thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/out-of-date/thesaurus/synonyms
ChicagoSmart Define. 2015. "out-of-date thesaurus" https://smartdefine.org/out-of-date/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, out-of-date thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/out-of-date/thesaurus/synonyms>.
MLASmart Define. "out-of-date thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/out-of-date/thesaurus/synonyms>