How to spell ISTR correctly?

If you meant to type "Ishtar", a Babylonian goddess, the correct spelling would be "Ishtar". If you are referring to the "ISTAR" surveillance system used by various armed forces, then that are the correct spelling. If neither of these are what you intended, could you give more context to narrow down the correct spelling?

• instr
• is tr
• ISR The ISR system detected the incoming threat and alerted the military to take necessary action.
• IST
• ISTA
• ISTC ISTC stands for the Illinois State Toll Highway Authority.
• ISVR
• STR The STR analysis detected a match with the suspect's DNA.

Opeits

• apes
• eats
• edits
• emits
• epics
• its
• oats
• obits
• odes
• odets