Custom
Duty
Duty noun - A charge usually of money collected by the government from people or businesses for public use.
Usage example: the shop at the airport charges no duty on tourist memorabilia
Mutual synonyms
How words are described
Both words in one sentence
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Dynasty Warriors: Dong Zhuo, who viewed honour as an outdated custom, duty as useless and he only cares about his gold, women, and land.
Source: Obviously Evil - Sonny had a secondary processor custom-made specifically to allow him to break the first law, while VIKI came to realize that the most effective way to fulfill her duty in protecting humans was to put "her" Mark 4 robots in control and keep everyone inside and under control, at all times, forever.
Source: Instant A.I., Just Add Water - The Call of Duty: Black Ops series has the same problem as Mario Kart DS - it allows players to create custom decals attached to their player card and emblazoned on their weapons in-game.
Cite this Source
Duty and Custom. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/custom/duty
Custom & Duty. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/custom/duty>.
Duty or Custom. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/custom/duty.
Google Ngram Viewer shows how "custom" and "duty" have occurred on timeline