Root ك و ب(k w b) has 2 unique word forms and appears 4 times in the Quran.

English gloss Drinking Glass, Tumbler

Word Translation Occurrences
بِأَكۡوَابٖ With vessels, With vessels 2
وَأَكۡوَابٖ and cups, and cups 2
وَأَكۡوَابٞ And cups, And cups 2
وَأَكۡوَابٖۖ and cups, and cups 2