4
parallelism(noun, connection, balance, harmony, parallel)
4
reckoning(noun, guess, estimate, calculation, guesstimate)
4
semblance(connection, harmony, parallel, likeness, similarity)
4
valuation(noun, guess, estimate, calculation, guesstimate)
4
vicinity(noun, proximity, nearness, imminence)
3
access(noun, approach)
3
advent
3
afflux
3
alikeness(noun, connection, harmony, parallel, likeness)
3
analogue(noun, balance, equal, double, equivalent)
3
appropinquation
3
association(noun, connection, harmony, parallel, relation)
3
ballpark figure(noun, expression, idiom, guess, judgment)
3
connection(noun, touch, harmony, parallel, relation)
3
correspondence(connection, parallel, likeness, similarity, resemblance)
3
deduction(noun, calculation)
3
deviation
3
differentiation
3
educated guess(noun, expression, idiom, guess, judgment)
3
evolution
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APASmart Define. (2015). approximation thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/approximation/thesaurus/synonyms
ChicagoSmart Define. 2015. "approximation thesaurus" https://smartdefine.org/approximation/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, approximation thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/approximation/thesaurus/synonyms>.
MLASmart Define. "approximation thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/approximation/thesaurus/synonyms>