Root ك ث ر(k v r) has 24 unique word forms and appears 167 times in the Quran.

English gloss Many, Numerous, More, Multiply

Word Translation Occurrences
كَثِيرٗا (as) many, many, much 76
أَكۡثَرَ (in) most, more, more numerous, most, most (of) 50
أَكۡثَرَهُمۡ most of them 30
أَكۡثَرُهُمۡ but most of them, most of them 22
أَكۡثَرُهُم most of them, Most of them were 22
كَثِيرٖ many, much 12
أَكۡثَرُ greater, (have) more, most 12
وَكَثِيرٞ and many, but many, but most 10
وَأَكۡثَرُهُمۡ and most of them, but most of them 8
كَثِيرٞ many 6
كَثِيرَةٞ abundant, many 6
كَثِيرَةٖ abundant, many 6
كَثِيرٗاۗ abundant, much 4
أَكۡثَرَكُمۡ most of you 4
كَثِيرَةٗ much 4
كَثِيرٗاۚ many 4
وَأَكۡثَرُهُمُ And most of them, but most of them 4
كَثِيرٗاۖ many, much (of it) 4
كَثِيرًا much 2
كَثِيرًاۖ great 2
تَسۡتَكۡثِرُ (to) acquire more 2
كَثِيرَةٗۚ many 2
كَثِيرَةٞۚ abundant 2
لِأَكۡثَرِهِم for most of them 2
ٱلتَّكَاثُرُ the competition to increase 2
لَٱسۡتَكۡثَرۡتُ surely I could have multiplied 2
لِكَثِيرٖ to many 2
ٱلۡكَوۡثَرَ Al-Kauthar 2
وَأَكۡثَرَ and more abundant 2
وَأَكۡثَرُ and greater 2
وَتَكَاثُرٞ and competition in increase 2
وَكَثِيرٌ But many 2
كَثِيرَةَۢ large 2
ٱسۡتَكۡثَرۡتُم you have (misled) many 2
فَأَكۡثَرۡتَ and you (have been) frequent 2
فَأَكۡثَرُواْ And (made) much 2
فَكَثَّرَكُمۡۖ and He increased you 2
كَثُرَۚ much 2
كَثۡرَةُ abundance 2
كَثُرَتۡ (they are) numerous 2
كَثۡرَتُكُمۡ your multitude 2
أَكۡثَرِهِمۡ most of them 2
كَثِيرٖۚ much 2