The irritating thing about it is that apparently Igor was the one to introduce the synonym. As he points out in this comment to another meta question:
Actually, the official name of the program (since a few years ago) is just "IDA". "IDA Professional" is what was previously called "IDA Pro Advanced".
Considering there is IDA Professional, IDA Starter and a freeware version it would make more sense to call all of them "IDA" (ida) instead of "IDA Pro" (idapro) which refers to a single edition out of three possibilities. In short: ida is a superset of idapro and should be the one to use, unless we want to add other tags for the starter and freeware editions of IDA.
I know this is probably not going to be popular with the moderators, perhaps not with Igor either, but as a matter of fact it would be:
- more correct
- more inclusive