The most common names (none official) is an "emordnilap" or an "anadrome."
Semordnilap is a name coined for a word or phrase that spells a different word or phrase backwards. "semordnilap" is itself "palindromes" spelled backwards. According to author O.V. Michaelsen, it was probably coined by logologist Dmitri A. Borgmann and appeared in Oddities and Curiosities, annotated by Martin Gardner, 1961.
Semordnilaps are also known as anadromes, volvograms, heteropalindromes, semi-palindromes, half-palindromes, reversgrams, mynoretehs, reversible anagrams, or word reversals.
NOON
MOW
Something that looks the same upside down has point symmetry.
The word "NOON" is an example of an image that reads the same right side up and upside down.
The word SWIMS, when written in upper case letters, is the longest word in the English language that reads the same both forward and upside-down with no reading difficulty.
SWIMS
The word is NOON.
The five-letter word that reads the same upside down and right side up when typed in upper case is "SWIMS." When flipped, it retains its appearance, making it a unique example of such a word.
pig on these are both words that look different but are still a word upside down.
NOON
its radar dont you get it you people are idiots
NOON