Here are some examples:
Ancient Greek:
* Basileus (βασιλεύς): This is the most common term for king in ancient Greek.
* Rex (ῥῆξ): This word, though Latin in origin, was also used in Greek, particularly in poetry and literature.
Ancient Latin:
* Rex: This is the most common Latin word for king.
Ancient Egyptian:
* Nesu-bit: This word literally means "he of the reed mat," referring to the king's authority.
* Per-aa: This word meant "great house" and referred to the king's palace.
Ancient Hebrew:
* Melekh (מלך): This is the Hebrew word for king.
Ancient Sanskrit:
* Raja (राजा): This is the Sanskrit word for king.
Ancient Chinese:
* Huangdi (皇帝): This word, literally meaning "Yellow Emperor," was used for the emperor of China.
* Wang (王): This word, meaning "king," was used for rulers of smaller kingdoms.
To give you a more accurate answer, you need to specify which ancient civilization or language you're interested in.