“SCREWER” is a valid word. — 12 points Scrabble

screwsomeone who guards prisoners
sewera waste pipe that carries away sewage or surface water
crewsthe men and women who man a vehicle (ship, aircraft, etc.)
ceres(Roman mythology) goddess of agriculture; counterpart of Greek Demeter
screea sloping mass of loose rocks at the base of a cliff
ewersan open vessel with a handle and a spout for pouring
resewsew again
serera West African language closely related to Fula; spoken primarily in Senegal and Gambia
sweer

werehave the quality of being; (copula, used with an adjective or a predicate noun)
crewthe men and women who man a vehicle (ship, aircraft, etc.)
seera person with unusual powers of foresight
rees
ewesa member of a people living in southern Benin and Togo and southeastern Ghana
sere(used especially of vegetation) having lost all moisture
errsto make a mistake or be incorrect
weesa short time
cees
recs
eweran open vessel with a handle and a spout for pouring
cerethe fleshy, waxy covering at the base of the upper beak of some birds
weer(used informally) very small

seethe seat within a bishop's diocese where his cathedral is located
sec1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
weea short time
sewfasten by sewing; do needlework
ere
cee
errto make a mistake or be incorrect
rec
ser
resa widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells
ewea member of a people living in southern Benin and Togo and southeastern Ghana
ree
ers

we
era trivalent metallic element of the rare earth group; occurs with yttrium
rea rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
ew
esa radioactive transuranic element produced by bombarding plutonium with neutrons

SCREWER