Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 10
Confusion; Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance
Human Factors; Procedure
Aircraft X called me having just departed ZZZ airport. I gave him the standard departure clearance; climb to flight level 230; and leaving 140 normal speed. He had a really hard time reading back the clearance; so I knew I would have to keep an eye on him. Because we are working COVID schedules; I was working all of my area's sectors; so I had other things to do; and moved on to other clearances. I had already taken a point out on Aircraft Y; who was being worked by Area Y; landing ZZZ1. I knew that the two were potential traffic; so I issued Aircraft X a clearance to go direct ZZZ2 which was the second fix on his route; he read back ZZZ2. I went back to other clearances. A short time later; Aircraft X keyed up and asked if ZZZ2 was ZXZ2. I corrected him and told him that ZZZ2 was ZZZ2. (ZXZ2 is a fix in [different state].) Aircraft X had already started to go towards ZXZ2; which put him head on with Aircraft Y descending into ZZZ1. In order to get Aircraft X out of the way at this point; I issued him a 360 degree heading. I had no idea which way he was turning at this point; so I just wanted to get him somewhere that I knew Aircraft Y was not going to be. I called Area Y and tried to get them to stop the Aircraft Y and give me radar contact; but they had already switched the aircraft to ZZZ approach. I had the Aircraft X stop his climb to buy myself a few more seconds. I called ZZZ Approach to try to get them to turn the Aircraft Y south; but they informed me that they had just put the Aircraft Y on a 360 heading as well; and he was much faster than my Aircraft X. I asked them if they could turn the Aircraft Y back to the south; and they said no. At that point; I turned my Aircraft X another 30 degrees to the right. Because the Aircraft Y was still descending; I climbed the Aircraft X; hoping to achieve vertical separation. Vertical separation was achieved soon after. I issued a turn to Aircraft X's next fix; and then a climb to his requested final altitude.The pilot put in ZXZ2 instead of ZZZ2. The [letter] and [letter] are next to each other on a QWERTY keyboard. This was probably an example of a slipped finger starting a domino effect of mishaps.
ZID Center Controller reported an airborne conflict while working all sectors in Controller's area during COVID-19 scheduling.