Judith Weingarten uses the stele of Kuttamuwa found in 2008 to initiate a discussion of the two terms in Palmyra.
Zenobia: Empress of the East: The Secret Language of Palmyra (Part II)
There is additional evidence for the use of the two terms. The bilingual inscription of the now destroyed Tomb of Hamrath at Suweida in Syria used 'stele' to refer to itself in Greek, NFS in Aramaic. Interestingly the tomb was decorated on the exterior with relief sculptures of arms and armour, so if it represented the interred, then one can make a guess that Hamrath was a warrior. The tomb is generally dated to the first century BC.