Root ر ك ع(r k E) has 10 unique word forms and appears 13 times in the Quran.

English gloss bow down in prayer, kneeling, Prostration

Word Translation Occurrences
ٱلرَّٰكِعِينَ those who bow down, those who bow down 4
وَٱلرُّكَّعِ and those who bow, and those who bow down, and those who bow, and those who bow down 4
ٱرۡكَعُواْ Bow, Bow 4
ٱلرَّٰكِعُونَ those who bow down, those who bow down 2
وَٱرۡكَعُواْ and bow down, and bow down 2
وَٱرۡكَعِي and bow down, and bow down 2
رَاكِعٗاۤ bowing, bowing 2
يَرۡكَعُونَ they bow, they bow 2
رُكَّعٗا bowing, bowing 2
رَٰكِعُونَ (are) those who bow down, (are) those who bow down 2