Root ر س و(r s w) has 5 unique word forms and appears 14 times in the Quran.

Word Translation Occurrences
رَوَٰسِيَ firmly set mountains, firmly-set mountains, firm mountains 18
أَرۡسَىٰهَا He made them firm 2
رَّاسِيَٰتٍۚ fixed 2
مُرۡسَىٰهَا (is) its arrival 2
مُرۡسَىٰهَاۖ its appointed time 2
وَمُرۡسَىٰهَآۚ and its anchorage 2