13
ungrateful(adjective, rude, grateful, churlish, appreciative)
10
unthankful(adjective, rude, grateful, churlish, thankless)
9
thankless(adjective, rude, grateful, churlish, ungrateful)
5
unmindful(adjective, thankless)
4
heedless(adjective, thankless, ungrateful)
4
rude(adjective, thankless)
4
self-centered(adjective, thankless)
3
thoughtless(adjective, thankless, ungrateful)
2
unthanking(adjective, grateful, thankless)
1
careless(adjective, thankless)
1
con
1
disagreeable
1
disappointed
1
discontented
1
against
1
disapprobatory
1
disapproving
1
disenchanted
1
displeased
1
dissatisfied
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APASmart Define. (2015). unappreciative thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unappreciative/thesaurus/synonyms
ChicagoSmart Define. 2015. "unappreciative thesaurus" https://smartdefine.org/unappreciative/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unappreciative thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unappreciative/thesaurus/synonyms>.
MLASmart Define. "unappreciative thesaurus" 3 November 2015. Web. 20 September 2026. <https://smartdefine.org/unappreciative/thesaurus/synonyms>