Advanced
Advanced adjective - Being far along in development.
Usage example: an advanced civilization, among the first anywhere to use the plow, developed on the banks of the Nile River thousands of years ago
Immature
Immature adjective - Lacking in adult experience or maturity.
Usage example: many high school students are still too immature to foresee the consequences of their actions
Nearby Word: immaturity
Both words in one sentence
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Guardians are corpses stuck to the walls; immature guardians can only flail their intestines at Isaac, but advanced ones can shoot out pods with tentacles similar to the lurkers.
Source: Combat Tentacles -
In Slayers Black Magician Girl Lina Inverse is mostly a self-centered, immature, avaricious and temperamental teenage girl with an advanced grasp on highly destructive Black Magic.
Source: Good Is Not Nice - In spite of his advanced knowledge of science and robotics, Eggman also appears to be very immature and is prone to throwing childish outbursts whenever something doesn't go his way.
Source: Man Child / Video Games
Cite this Source
Immature and Advanced. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/advanced/immature
Advanced & Immature. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/advanced/immature>.
Immature or Advanced. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/advanced/immature.
Google Ngram Viewer shows how "advanced" and "immature" have occurred on timeline