Cap
Envelope
Envelope noun - A flat (usually rectangular) container for a letter, thin package, etc..
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Envelope and Cap. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/cap/envelope
Cap & Envelope. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/cap/envelope>.
Envelope or Cap. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/cap/envelope.
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