The thorny devil, an Australian lizard, pools water in the grooves of its skin, funneling it toward the corners of its mouth to drink. BrE is probably influenced by a tendency toward s shorter vowels and greater awareness of French, while AmE isn't. I'd suggest "terminological inexactitude"but now that I look it up, I find that my idea of its origin was not quite right. While you are looking for an idiom, the examples you give seem to be a mild form of apophasisa form of irony a rhetorical device wherein the speaker or writer brings up a subject by either denying it, or denying that it should be brought up [ Wikipedia ] One of the most famous quotes is that of Shakespeare's Marc Antony I come to bury Caesar, not to praise him. Or xyz is still true, no matter what you say.
Similarly, "ant[i]dote", "ant[i]pathy", but "ant[ee]proton" and either "ant[ai]trust" or "ant[ee]trust".
11 Animals that Feast Together