Cases
Envelope
Envelope noun - A flat (usually rectangular) container for a letter, thin package, etc..
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Synonyms for Envelope
Cases and envelope are semantically related. Sometimes you can replace term "Cases" with "Envelope", this nouns are similar.
Mutual synonyms
Both words in one sentence
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The cases in Book 2 are only a little bit more difficult than those in Book 1, with "Case of the Envelope Espionage" being one of the most noteworthy difficult ones.
Source: Video Game / Eagle Eye Mysteries
Cite this Source
Envelope and Cases. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/cases/envelope
Cases & Envelope. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/cases/envelope>.
Envelope or Cases. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/cases/envelope.
Google Ngram Viewer shows how "cases" and "envelope" have occurred on timeline