Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
AA miles are redeemable on Etihad, but only when Etihad has low-tier award seats available.
AA has several other partners that serve BOM, including LY, QR, and RJ.
A strategy that some FTers have used is to fly CX or CX/UL to CMB (which is in AA's Asia 2 zone), and then purchase a cash ticket from CMB to BOM. (An AA award ticket would not let you fly from SFO to BOM via the Pacific; an award ticket from SFO to CMB would.)