Age
Age noun - The state of being an old person.
Usage example: at 88, she gets frustrated by the feebleness that is inevitable with age
Immaturity
Immaturity noun - Not having reached maturity.
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Synonyms for Immaturity
Age is an antonym for immaturity.
Nearby Word: immature
How words are described
Both words in one sentence
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Due to his relative youth at age 13 and overall immaturity, the mantle passed to Aqualad (age 16 at the time).
Source: The Baby of the Bunch -
It's been heavily and repeatedly emphasized that the only thing holding back the true potential of the Konoha 12 is their age and relative immaturity of their bodies, particularly Naruto.
Source: Fan Fic / Yet again - This is exactly how General Thiébault describes General Junot in his Mémoires ("At heart, he was not a man but a child, who could age but never grow up"); he gives spectacular examples of his extravagances and general immaturity, which he mentions as the main cause of his disgrace.
Source: Man Child / Literature
Cite this Source
Immaturity and Age. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/age/immaturity
Age & Immaturity. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/age/immaturity>.
Immaturity or Age. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/age/immaturity.
Google Ngram Viewer shows how "age" and "immaturity" have occurred on timeline