Nine letter words that begin and end with the same letter:
abundance
Nabobisms and nachtmaal are the nine letter words that start with the letter n.
Vist the related link, it has 2310 nine letter words, staring with A.
Rochester
Nine
Lethargic
Parachute or Pantomime
Christian Christian
appaloosa
Kangaroos
WHIRLPOOL
nutrition