- Definitions|2
- Thesaurus|435
- Abbreviations|0
| cruel(adjective, rude, inconsiderate, unappreciative, unthankful) | |
| futile(adjective, unappreciated) | |
| impolite | |
| miserable(adjective, unappreciated) | |
| profitless | |
| rude(adjective, inconsiderate, unappreciative, unthankful) | |
| ungratifying | |
| unmannerly | |
| unpopular(pain, unpleasant, disagreeable, lousy, unwelcome) | |
| wretched(adjective, unappreciated) | |
| bitter | |
| disrespectful | |
| ingrate(noun, ingratitude) | |
| obnoxious(pain, unpleasant, disagreeable, lousy, unwelcome) | |
| unceremonious | |
| uncivil | |
| undesirable(pain, unpleasant, disagreeable, lousy, annoying) | |
| unmindful(adjective, inconsiderate, unappreciative, ingratitude) | |
| unpalatable | |
| unprofitable(adjective, unappreciated) |
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| APA | Smart Define. (2015). thankless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/thankless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "thankless thesaurus" https://smartdefine.org/thankless/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, thankless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/thankless/thesaurus/synonyms>. |
| MLA | Smart Define. "thankless thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/thankless/thesaurus/synonyms> |