The word 'Stop' and 'Stopping' as defined in CAP413 should be used. For example, once an aircraft has commenced the roll ATC will use the phraseology, 'bigjet 345 stop immediately, I say again stop immediately acknowledge'. Therefore, as Bucket and Spade say's, if you're rejecting the take, use the terminology 'bigjet 345 stopping'.
The change however from the use of Aborted to Rejected Take Off came about a good number of years ago; and I stand to be corrected here- but if I remember it was driven by Boeing who adopted RTO rather than aborted and has since been adopted by the industry. Came about around the same time we changed from 'overshooting' to 'Going Around'.