Call sign
Call letters and call sign are semantically related. In some cases you can use "Call letters" instead a noun "Call sign".
Call letters
Call sign and call letters are semantically related. Sometimes you can replace term "Call sign" with "Call letters", this terms are similar.
Mutual synonyms
Cite this Source
Call letters and Call sign. (2017). Retrieved 2026, August 01, from https://thesaurus.plus/related/call_sign/call_letters
Call sign & Call letters. N.p., 2017. Web. 01 Aug. 2026. <https://thesaurus.plus/related/call_sign/call_letters>.
Call letters or Call sign. 2017. Accessed August 01, 2026. https://thesaurus.plus/related/call_sign/call_letters.
Google Ngram Viewer shows how "call sign" and "call letters" have occurred on timeline