The correct form is "cearasafuri", with the letter "s", not "cearceafuri". This form is found in the DEX (Dictionary) explanatory of the Romanian language), being considered the standard form.
Some people may use the form "cearceafuri" instead of "cesafuri" due to regional pronunciation or influences from other languages. However, in standard Romanian, the correct form is "cesafuri".
It should also be mentioned that there are other words that can be considered synonyms for "sheets", such as "bed sheets". pat" or simply "sheet" in certain contexts.