89 words:
ENTIRE
RETINE
LINTER
RELINE
RELENT
TRIENE
LIERNE
RETILE
LITRE
TERNE
LITER
RELET
RETIE
RENTE
RELIT
LINER
TREEN
ENTER
NITER
TRINE
ELINT
ELITE
NITRE
INERT
INLET
INTER
TILER
RENT
REEL
REIN
TILE
TIER
TERN
TINE
TREE
TIRL
TIRE
RILE
RIEL
RETE
RITE
TELE
TEEN
TEEL
NITE
LINE
LIER
LIRE
LINT
LIEN
LEER
ERNE
LENT
LEET
LITE
TEN
LEE
TIE
LEI
TEL
NIL
IRE
ERN
ERE
EEL
TIL
TIN
NIT
REI
NET
LIE
LIN
LIT
NEE
RET
RIN
REE
TEE
LET
ER
NE
EN
TI
EL
ET
IN
LI
RE
IT
treenil