Infestation
Infestation noun - The state of being invaded or overrun by parasites.
Pest and infestation are semantically related. in disease topic. In some cases you can use "Pest" instead a noun "Infestation".
Nearby Words: infested, infesting
Pest
Pest noun - A widespread disease resulting in a high rate of death.
Mutual synonyms
Both words in one sentence
-
Made worse that it happens to be a plant pest that can wipe out a grove of plants in a severe infestation...thank heaven for ladybugs!
Source: Explosive Breeder - When a small pest infestation turns into a full blown incursion, the 'Gang' must battle giant spiders, mystical guardians and unravel an ancient prophecy to stop an all out invasion.
Source: Fanfic Recs / Roblox -
At another point in the Discworld series, there's an anecdote about people attempting the "pest" version of this when Ankh-Morpork was in the throes of a rat infestation and people were being paid per rat.
Source: Monster Protection Racket
Cite this Source
Pest and Infestation. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/infestation/pest
Infestation & Pest. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/infestation/pest>.
Pest or Infestation. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/infestation/pest.
Google Ngram Viewer shows how "infestation" and "pest" have occurred on timeline