That could be dud.
dud
A good DEED is a palindrome for good work done by a scout.
The word river is not a palindrome; spelled in reverse, river is revir. This doesn't work. A palindrome is a word or a sentence that is spelled the same forward or backward, like 'radar'. In sentence form, the word breaks do not have to be in the same places when reversed. Famous examples are: "Able was I ere I saw Elba." "A man, a plan, a canal: Panama." The river Exe in England is a river whose name is a palindrome.
deed
Corroborate; is a verb - a doing word. It is something you do or don't do. "The suspect would not corroborate with the police." i.e. he wouldn't give them information, would refuse to work with them.
A palindrome for something that fails to work is "bug".
dud
dud
deed
a neep[not able to work
The most common palindrome is 'racecar', but 'a Toyota' and 'Civic' (a Honda car model) could also work.
A good DEED is a palindrome for good work done by a scout.
The word river is not a palindrome; spelled in reverse, river is revir. This doesn't work. A palindrome is a word or a sentence that is spelled the same forward or backward, like 'radar'. In sentence form, the word breaks do not have to be in the same places when reversed. Famous examples are: "Able was I ere I saw Elba." "A man, a plan, a canal: Panama." The river Exe in England is a river whose name is a palindrome.
Gag and Deed
deed
dud
Deed