The word is fetid.
Third (exactly 5 letters)
abate
Banjo
extra
No, it has four letters.
tattoo
The letters spell the 5 letter word unarm. They also spell the 4 letter word aura.
The longest is 5 letters: avoid
augur
canny
disco
esses
The word is fetid.
The 5 letter word is white.
Third (exactly 5 letters)
The letters can be used to spell the 5 letter word plenty.