One of those words that are the same forwards and backwards (called a palindrome) and has two 'r's's is racecar. I don't know if this is the word you are looking for, but
A five letter word that can be spelled forward and backward is "Madam".
Bob
repaper, rotator, reviver
Devoved Repaper reviver testset rotator
Peep.
redder
The antonym for forward is backward, but the opposite direction can be reverse or rearward.
The three-letter word for energy that is the same spelled backwards and forwards is "rad."
The German noun reittier.
palindrome
"Madam, I'm Adam". (same letter order forward or backward)
Race car spelled backwards is the same thing: race car.