wallow.
Wallow
Ingurgitating means overeat or eat immodestly; is a word that starts and ends with ing.
Wriggle?
A word that starts with AN and ends with OR: ancestor.
nonagenarian
Arise?
The word is pleasant.
A word that starts with A and ends with U: apercu.
A word that starts with E and ends with A: extravaganza.
Limp
The word MATE means one of a matched pair.
A word that starts with S and ends with X is sphinx.