Both Bosporus and Bosphorus are acceptable spellings for the narrow, natural strait and internationally significant waterway located in northwestern Turkey.
Citation
Use the citation below to add this article to your bibliography:
"Bosphorus vs. Bosporus." Grammar.com. STANDS4 LLC, 2021. Web. 20 Jan. 2021. <https://www.grammar.com/bosphorus_vs._bosporus>.