Letterboxes
Mail slots and letterboxes are semantically related. In some cases you can use "Mail slots" instead a noun "Letterboxes".
Mail slots
Letterboxes and mail slots are semantically related. You can use "Letterboxes" instead a noun phrase "Mail slots".
Mutual synonyms
Cite this Source
Mail slots and Letterboxes. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/letterboxes/mail_slots
Letterboxes & Mail slots. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/letterboxes/mail_slots>.
Mail slots or Letterboxes. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/letterboxes/mail_slots.
Google Ngram Viewer shows how "letterboxes" and "mail slots" have occurred on timeline