Become rusty
Decay and become rusty are semantically related. In some cases you can use "Decay" instead a verb phrase "Become rusty".
Decay
Decay verb - To go through decomposition.
Cite this Source
Decay and Become rusty. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/become_rusty/decay
Become rusty & Decay. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/become_rusty/decay>.
Decay or Become rusty. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/become_rusty/decay.
Google Ngram Viewer shows how "become rusty" and "decay" have occurred on timeline