enrage
Six letter words using the letters 'nuspiegn' are ensign, supine, and genius.
A six letter work is sicker.
LEGACY
fervor
NETHER
iambus
onward
Versus.
tidies
Accord is a six letter word. Accrue is another six letter word.
There are no English words that meet the criteria, even when you repeat the letters (which you need to do to make five letters spell a six-letter word).
jitney