Lord

CRITICAL: al-Rabb is a defining title of Allah (Rabb al-‘Alamin, opening of the Quran). Applying it to Jesus in Romans 10:9 is doctrinally exact - it is precisely the claim of full deity that must be made - but it is also maximally confrontational, since ascribing Allah’s own title to a human-born man is the paradigm case of shirk in Islamic theology. السيد/المولى (‘master/patron’) would soften the claim into mere human respect and are explicitly rejected.