Stem كَفَرَ has 2 unique word forms and appears 19 times in the Quran.

Word Translation Occurrences
كَفَرَ disbelieved, disbelieves, he disbelieves, (is) ungrateful 32
كَفَرَۗ disbelieved 2
كَفَرَۚ denied 2
وَكَفَرَ and disbelieves 2