| either(adverb, conjunction, conversely) | |
| on the other hand(noun, expression, idiom, conjunction, opposition) | |
| operating room(noun, expression, idiom, room) | |
| and | |
| rather(conjunction, either, instead) | |
| also | |
| instead(conjunction, rather, either) | |
| otherwise(conjunction, uncertainty, either) | |
| approximately(conjunction, roughly) | |
| or else(expression, idiom, conjunction, either, otherwise) | |
| surgery | |
| alas | |
| alternatively | |
| as a substitute(expression, idiom, conjunction, either, conversely) | |
| in other words(expression, idiom, conjunction, either, conversely) | |
| whether | |
| operating theater(noun, expression, idiom) | |
| operating theatre(noun, expression, idiom) | |
| Beaver State | |
| alternative(conjunction, uncertainty, either) |
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| APA | Smart Define. (2016). or thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/or/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "or thesaurus" https://smartdefine.org/or/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, or thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/or/thesaurus/synonyms>. |
| MLA | Smart Define. "or thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/or/thesaurus/synonyms> |