Mass
Mass verb - To gradually form into a layer, pile, or mass.
Top up
Mutual synonyms
Cite this Source
Top up and Mass. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/mass/top_up
Mass & Top up. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/mass/top_up>.
Top up or Mass. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/mass/top_up.
Google Ngram Viewer shows how "mass" and "top up" have occurred on timeline