Reconstructions

PS
*riˀm- - wild bull (bos primigenius) (SED II No. 186; Kogan 2011: 208)
PS
*raˀ/w/hy- - kind of bird (SED II No. 187)
Phonetically and semantically rather diverse. Akk. ru ‘eagle’ attested in Hh. XIV 137 (= A.MUSEN) is hardly relevant for comparison: as rightly suggested in CAD R 392, it must be “ variant, perhaps erroneous, for aru” (present in another variant of the same entry of Hh.).
PS
*rˁw - to join, to put together (Kogan 2015: 456)
PS
*raˀš- - head (SED I No. 225)
PS
*raˁd- - thunder (Fronzaroli 1964: 40, 52, 1965: 140; Kogan 2011: 194)
PS
*rbk - to mix, to stir (HALOT 1179; BDB 916)
PS
*rbṣ̂ - to lie down, to rest (mostly of animals) (HALOT 1181, Kogan 2015: 342)
PS
*ru/abṣ̂- - womb, uterus

Note derived Arm. forms with the ma-­ prefix.

PS
*rby - to be large (Kogan 2015: 196–197)
PS
*rVby- - crotch, groin (SED I No. 227; Kogan 2011: 218)