Annex
Annex verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.
Usage example: plans to annex the supply room so as to make the classroom bigger
Attach is a synonym for annex in joining topic. In some cases you can use "Attach" instead a verb "Annex", when it comes to topics like add, join, increase, join or add. popular alternative
Mutual synonyms
Cite this Source
Attach and Annex. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/annex/attach
Annex & Attach. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/annex/attach>.
Attach or Annex. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/annex/attach.
Google Ngram Viewer shows how "annex" and "attach" have occurred on timeline