According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 57 words with the pattern --E--C---S. That is, ten letter words with 3rd letter E and 6th letter C and 10th letter S. In alphabetical order, they are:

aceraceous

amebocytes

americiums

arenaceous

avenaceous

clearcoles

clericates

cleruchias

cleruchies

coenocytes

cremocarps

cretaceous

dieticians

foeticides

gaelicises

gaelicisms

gaelicizes

greatcoats

haemocoels

haemocytes

hieraciums

hierocrats

irenicisms

myelocytes

oleraceous

overscores

phenacites

poeticises

poeticisms

poeticizes

poeticules

preaccuses

precocials

precocious

predaceous

predacious

predicants

predicates

predicters

predictors

preexcites

prefocuses

prelectors

prelocates

prerecords

queencakes

queercores

reeducates

reenactors

reexecutes

sheepcotes

smearcases

sweetcorns

thearchies

trebuchets

trebuckets

weedicides