Seven letter words using the letters PESOLCTCYLTNEBLPIUTA are:
PATIENT
ELASTIC
SECTION
OUTCAST
LETTUCE
CONTEST
TYPICAL
CALYPSO
LULLABY
TOENAIL
NOTABLE
ECLIPSE
BECAUSE
LACTOSE
PLASTIC
INSPECT
UTENSIL
TACTICS
ACCOUNT
Planets and platens.
Plants
outside
You can make two 7 letter words : COSTARS and CASTORS
Germany
lidless
Demented
netball
choanae
stammer
laminae
Wiriest
chrisms
No 7 letter words, the longest is 6 letters, purist