“RARES” is a valid word. — 5 points Scrabble

earsthe sense organ for hearing and equilibrium
rarenot widely known; especially valued for its uncommonness
rearthe back of a military formation or procession
arsethe fleshy part of the human body that you sit on
ares(Greek mythology) Greek god of war; son of Zeus and Hera; identified with Roman Mars
seraan amber, watery fluid, rich in proteins, that separates out when blood coagulates
searmake very hot and dry
erasa period marked by distinctive character or reckoned from a fixed point or event
errsto make a mistake or be incorrect
rasetear down so as to make flat with the ground

area unit of surface area equal to 100 square meters
seaa division of an ocean or a large body of salt water partially enclosed by land
earthe sense organ for hearing and equilibrium
eraa period marked by distinctive character or reckoned from a fixed point or event
errto make a mistake or be incorrect
ser
sae
resa widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells
rasthe network in the reticular formation that serves an alerting or arousal function
ers
ars

asa very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
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
esa radioactive transuranic element produced by bombarding plutonium with neutrons
ara colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
ae

RARES