Words

Akkadian
arammu - wharf, embankment (of a canal); ramp, causeway (CAD A2 227, AHw. 64)
Akkadian
arāru - to rot, to discharge a putrid liquid, to defecate (CAD A₂ 237, AHw. 65)

Var. , ḫarāru
Perhaps related to PWS *ḫVrˀ- 'excrement, dregs'.

Akkadian
arḫānû - a certain stage of growth of the date palm (CAD A₂ 255)
Akkadian
arḫu - cow (CAD A₂ 263, AHw. 67)
Akkadian
āribu - crow, raven (CAD A₂ 265, AHw. 68)
Akkadian
arīḫu - a kind of milkweed (CAD A₂ 267)
Akkadian
ariktu - spear (CAD A₂ 267)

SB

Akkadian
arītu - shield (CAD A₂ 269)
Akkadian
arkabu - (kind of) bat (CAD I 177, AHw. 67, Civil 1984a)

Var. , irkabu, argabu.
Probably related to PS *ˁakbar- 'mouse, jerboa' with a meaning shift and metathesis. The phonetic shape of the Akk. term and its meaning have been convincingly established in a special study Civil 1984a (contrast ‘a bird’ in CAD I 177, ‘Taube’ in AHw. 67; note that the translation ‘bat’ is present in some earlier studies such as Landsberger 1934 97, Biggs 1967 25).

Akkadian
arku - long, tall (CAD A₂ 283, AHw. 69)