Root خ ص ص(x S S) has 3 unique word forms and appears 4 times in the Quran.

Word Translation Occurrences
يَخۡتَصُّ chooses, He chooses, chooses, He chooses 4
خَآصَّةٗۖ exclusively, exclusively 2
خَصَاصَةٞۚ poverty, poverty 2