Thoughtless and Unappreciative

Thoughtless

Thoughtless adjective - Showing a lack of manners or consideration for others.

Unappreciative and thoughtless are semantically related In some cases you can use "Unappreciative" instead an adjective "Thoughtless".

Unappreciative

Unappreciative adjective - Not showing gratitude.
Usage example: vowed that his unappreciative niece would never receive another birthday present from him

Thoughtless and unappreciative are semantically related in thankless topic. You can use "Thoughtless" instead an adjective "Unappreciative".
Cite this Source
Unappreciative and Thoughtless. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/thoughtless/unappreciative
Thoughtless & Unappreciative. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/thoughtless/unappreciative>.
Unappreciative or Thoughtless. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/thoughtless/unappreciative.
Google Ngram Viewer shows how "thoughtless" and "unappreciative" have occurred on timeline