I know that both Japanese & Mandarin have a couple of words where it’s a thing, like 施設 (しせつ) from JP which becomes 設施 (shèshī) in ZH, even though they use the same 漢字 since the only difference is that the characters are flipped but retain the same definition between the two languages. Even in Japanese itself there are words where the placement of 漢字 can be reversed, like 礼儀 ("manners") & 儀礼 ("etiquette") for instance.
I’m not sure I understand your question fully. Are you looking for two words with the same/similar meaning and etymology but with completely reversed letters? That’s not going to happen in alphabetic languages, because it’s simply not how languages work - completely reversing the actual sounds that come out of your mouth is a phonetic impossibility.
You will be able to find examples where two morphemes have swapped places, similar to your manners/etiquette example, but usually the meaning will change too. The first example that came to my mind is boathouse / houseboat - the former is a building used to store boats, the latter is a boat which is also a dwelling.
Fallibilist@feddit.uk 6 days ago
Saippuakauppias is the same word either way you read it. It’s finnish and means a soap salesman.