162 entries under noun topic. ×
| optional extra(expression, addition, attachment, supplement) | |
| outsert | |
| partner(addition, attachment) | |
| porch(addition, wing, conservatory, lean-to) | |
| premium | |
| preservative(attachment, supplement) | |
| profit(extra, supplement, appendage, add-on) | |
| projection(addition, attachment) | |
| protuberance(addition, attachment) | |
| pullout(increase, extra, addition, supplement) | |
| something added(expression, increase, extra, addition) | |
| something conjoined(expression, addition, supplement) | |
| spin-off(increase, extra, addition, additive) | |
| subordinate(addition, attachment) | |
| supplementary building(expression, addition, extension) | |
| suppletion | |
| surcharge(extra, supplement, appendage, add-on) | |
| tip-in | |
| treat(addition, supplement) | |
| trimming(addition, supplement) |
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| APA | Smart Define. (2015). addendum thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/addendum/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "addendum thesaurus" https://smartdefine.org/addendum/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, addendum thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/addendum/thesaurus/synonyms>. |
| MLA | Smart Define. "addendum thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/addendum/thesaurus/synonyms> |