Increase
Increase verb - To make greater in size, amount, or number.
Usage example: we have to increase the number of season-ticket holders if the local sports franchise is to survive
Lengthen is a synonym for increase in extend topic. In some cases you can use "Lengthen" instead a verb "Increase", when it comes to topics like heighten, add or grow.
Mutual synonyms
Common collocations
Cite this Source
Lengthen and Increase. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/increase/lengthen
Increase & Lengthen. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/increase/lengthen>.
Lengthen or Increase. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/increase/lengthen.
Google Ngram Viewer shows how "increase" and "lengthen" have occurred on timeline