Adult
Adult adjective - Relating to or typical of adults; displaying proper maturity.
Responsible and adult are semantically related In some cases you can use "Responsible" instead an adjective "Adult".
Responsible
Responsible adjective - Being the one who must meet an obligation or suffer the consequences for failing to do so.
Adult and responsible are semantically related in trustworthy topic. Sometimes you can use "Adult" instead an adjective "Responsible", if it concerns topics such as sensible.
Mutual synonyms
Both words in one sentence
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Wise Beyond Their Years: They may just be kids, but they act responsible and adult pretty fast.
Source: Manga / Drifting Classroom -
Elodianne seems to be adult and responsible but progressively becomes irritated and pessimistic.
- The final member is the oldest of the trio, and thinks of himself as very adult and responsible.
Cite this Source
Responsible and Adult. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/adult/responsible
Adult & Responsible. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/adult/responsible>.
Responsible or Adult. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/adult/responsible.
Google Ngram Viewer shows how "adult" and "responsible" have occurred on timeline