3
understanding(noun, agreement)
2
accompaniment
2
additive(noun, extra, supplement, appendage, add-on)
2
adjunct(noun, extra, supplement, appendage, add-on)
2
adjuvant
2
advent(noun, advance, return, approach, way)
2
amplification(increase, rise, growth)
2
annex(noun, extra, supplement, appendage, add-on)
2
annexation
2
appendage(noun, extra, supplement, add-on)
2
appendix(noun, extra, supplement, appendage, add-on)
2
approval(agreement, consent, assent, acquiescence)
2
appurtenant
2
attachment(noun, extra, supplement, appendage, add-on)
2
augment
2
authorization(agreement, acquiescence)
2
boost(noun, advance, increase, raise, gain)
2
buildup(noun, increase, rise, growth, gathering)
2
coming(noun, advance, return, approach, way)
2
concession(noun, agreement, approval, union, statement)
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APASmart Define. (2016). accession thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/accession/thesaurus/synonyms
ChicagoSmart Define. 2016. "accession thesaurus" https://smartdefine.org/accession/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, accession thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/accession/thesaurus/synonyms>.
MLASmart Define. "accession thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/accession/thesaurus/synonyms>