Obligation
Obligation noun - Something one must do because of prior agreement.
Usage example: their financial obligations keep them from giving to charities as much as they would like
Pick is an antonym for obligation.
Pick
Pick noun - The power, right, or opportunity to choose.
Usage example: you have first pick of your office mates for the softball team
Obligation is an antonym for pick.
How words are described
Both words in one sentence
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Usually sets can be paired thematically, but you are under no obligation (and rarely any penalty) to pick said combos; you can choose to have one fire-based and one ice-based set for example.
Source: Video Game / City of Heroes
Cite this Source
Pick and Obligation. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/obligation/pick
Obligation & Pick. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/obligation/pick>.
Pick or Obligation. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/obligation/pick.
Google Ngram Viewer shows how "obligation" and "pick" have occurred on timeline