General terms:
* Palindrome: This is the most common term used for words or phrases that read the same forwards and backwards. While it's not specific to Malayalam, it encompasses the same concept.
* Reversible word: This term emphasizes the ability to reverse the word while maintaining the same meaning.
* Mirror word: This term focuses on the visual aspect of the word being a mirror image of itself.
More specific terms:
* Malayalam palindrome: This term explicitly indicates the specific linguistic context.
* Word with reverse symmetry: This term highlights the symmetrical structure of the word.
Ultimately, the best term to use depends on the specific situation and your desired level of specificity.