Infantile
Infantile adjective - Having or showing the annoying qualities (as silliness) associated with children.
Undersized and infantile are semantically related. In some cases you can use "Undersized" instead an adjective "Infantile".
Undersized
Undersized adjective - Of a size that is less than average.
Infantile and undersized are semantically related. Sometimes you can use "Infantile" instead an adjective "Undersized".
Mutual synonyms
Cite this Source
Undersized and Infantile. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/infantile/undersized
Infantile & Undersized. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/infantile/undersized>.
Undersized or Infantile. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/infantile/undersized.
Google Ngram Viewer shows how "infantile" and "undersized" have occurred on timeline