“SIZERS” is a valid word. — 15 points Scrabble

sizethe physical magnitude of something (how big it is)
risea growth in strength or number or importance
sirea title of address formerly used for a man of rank and authority
sirsterm of address for a man
reisany rational or irrational number
seis
iresa strong emotion; a feeling that is oriented toward some real or supposed grievance
sers
sris

sirterm of address for a man
sisa female person who has the same parents as another person
sri
ser
rei
resa widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells
sei
ess
irea strong emotion; a feeling that is oriented toward some real or supposed grievance
ers

ishave the quality of being; (copula, used with an adjective or a predicate noun)
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
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
esa radioactive transuranic element produced by bombarding plutonium with neutrons

SIZERS