Unsatisfactory
Unsatisfactory adjective - Falling short of a standard.
Vacuous and unsatisfactory are semantically related. In some cases you can use "Vacuous" instead an adjective "Unsatisfactory".
Nearby Word: unsatisfactorily
Vacuous
Vacuous adjective - Lacking contents that could or should be present.
Unsatisfactory and vacuous are semantically related. Sometimes you can use "Unsatisfactory" instead an adjective "Vacuous".
Mutual synonyms
Cite this Source
Vacuous and Unsatisfactory. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/unsatisfactory/vacuous
Unsatisfactory & Vacuous. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/unsatisfactory/vacuous>.
Vacuous or Unsatisfactory. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/unsatisfactory/vacuous.
Google Ngram Viewer shows how "unsatisfactory" and "vacuous" have occurred on timeline