hardwhat am-i

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
Common Wrong Answers
“WIND”
WIND does not fulfill the criteria of being read the same way when turned upside down, nor is it a palindrome.
“BOMB”
BOMB cannot be read backward or upside down as a valid word, and it does not match the riddle's requirements.
“MOON”
While MOON is a 4-letter word, it cannot be read upside down the same way as NOON.