Build up
Build up verb - To gradually form into a layer, pile, or mass.
Usage example: evidence that the toxic chemical builds up in the bloodstream to unhealthy levels
Mass
Mass verb - To gradually form into a layer, pile, or mass.
Usage example: clouds massing on the western side of the mountain range
Both terms in one sentence
- You can build up your leg strength to jump higher and build up your muscle mass to make you stronger and heavier, but you cannot work yourself to being as tall as Shaquille O'Neal.
Source: Hard Work Hardly Works - While dumping the toilet went too fast to form a solid mass, a slow leak was found to build up ice on a plane's fuselage until it broke off for a similar effect, confirming the myth.
Source: High-Up Ice-Up - One problem is that secrets tend to build up to a Secret Critical Mass.
Source: Ostentatious Secret
Cite this Source
Mass and Build up. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/build_up/mass
Build up & Mass. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/build_up/mass>.
Mass or Build up. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/build_up/mass.
Google Ngram Viewer shows how "build up" and "mass" have occurred on timeline