| parallelism(noun, connection, balance, harmony, parallel) | |
| reckoning(noun, guess, estimate, calculation, guesstimate) | |
| semblance(connection, harmony, parallel, likeness, similarity) | |
| valuation(noun, guess, estimate, calculation, guesstimate) | |
| vicinity(noun, proximity, nearness, imminence) | |
| access(noun, approach) | |
| advent | |
| afflux | |
| alikeness(noun, connection, harmony, parallel, likeness) | |
| analogue(noun, balance, equal, double, equivalent) | |
| appropinquation | |
| association(noun, connection, harmony, parallel, relation) | |
| ballpark figure(noun, expression, idiom, guess, judgment) | |
| connection(noun, touch, harmony, parallel, relation) | |
| correspondence(connection, parallel, likeness, similarity, resemblance) | |
| deduction(noun, calculation) | |
| deviation | |
| differentiation | |
| educated guess(noun, expression, idiom, guess, judgment) | |
| evolution |
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| APA | Smart Define. (2015). approximation thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/approximation/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "approximation thesaurus" https://smartdefine.org/approximation/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, approximation thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/approximation/thesaurus/synonyms>. |
| MLA | Smart Define. "approximation thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/approximation/thesaurus/synonyms> |