Words

Arabic
ˀirāḫ- - antilope (Fr. I 25, TA 7 226)
Possibly related.
Arabic
ˀirḫat- - génisse (heifer) (BK 1 24)
Cf. also ˀarḫ-, ˀurḫiyy- id. (Fr. I 25, LA III 4).
Arabic
ˀrk - to keep in a place, to remain, to continue (Lane 50)
Arabic
ˀiram- - a sign of mark set up to show the way; stones set up as a sign to mark or show the way in the desert (Lane 51)

Compared with Akk. arammu and Proto-MSA *ˀarVm-/*ˀarm- (Kogan 2015:544)

Arabic
ˀarmalat- - widow (Lane 1160)
must be related with a mutation of sonorants
Arabic
ˀrn - mordre, saisir avec les dents (to bite, to grasp with teeth) (BK 1 27)
Possibly related.
Arabic
ˀirān- - oryx mâle (male oryx) (Blachère 89, LA XIII 14)
Arabic
ˀirān-, miˀrān- - repaire d'une bête feroce (lair of a ferocious beast) (BK 1 27)
Possibly related.
Arabic
ˀarnab- - hare, rabbit (BK 1 27, Lane 1164)
Arabic
ˀurwiyyat- - (pl. ˀarāwiyy-, ˀarwā) mountain-goat (BK 1 959, Lane 1196)
Cf. LA XIV 350 (ˀu/irwiyyat-) = ˀal-ˀunṯā mina-l-wuˁūli.