Call letters
Call sign and call letters are semantically related. In some cases you can replace term "Call sign" with "Call letters", this terms are similar.
Call sign
Call letters and call sign are semantically related. You can use "Call letters" instead a noun "Call sign".
Mutual synonyms
Cite this Source
Call sign and Call letters. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/call_letters/call_sign
Call letters & Call sign. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/call_letters/call_sign>.
Call sign or Call letters. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/call_letters/call_sign.
Google Ngram Viewer shows how "call letters" and "call sign" have occurred on timeline