“XYSTER” is a valid word. — 16 points Scrabble

tyresa port in southern Lebanon on the Mediterranean Sea; formerly a major Phoenician seaport famous for silks
treysthe cardinal number that is the sum of one and one and one
tyers

restsomething left after other parts have been taken away
sexymarked by or tending to arouse sexual desire or interest
treythe cardinal number that is the sum of one and one and one
tyrea port in southern Lebanon on the Mediterranean Sea; formerly a major Phoenician seaport famous for silks
sextthe fourth of the seven canonical hours; about noon
erstat a previous time
styean infection of the sebaceous gland of the eyelid
retsplace (flax, hemp, or jute) in liquid so as to promote loosening of the fibers from the woody tissue
ryesthe seed of the cereal grass
tyes
tyer
stey
xyst

yesan affirmative
tryearnest and conscientious activity intended to do or accomplish something
yetup to the present time
seta group of things of the same kind that belong together and are so used
sexactivities associated with sexual intercourse
rexa male sovereign; ruler of a kingdom
ryethe seed of the cereal grass
ser
resa widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells
styan infection of the sebaceous gland of the eyelid
ers
tye
retplace (flax, hemp, or jute) in liquid so as to promote loosening of the fibers from the woody tissue

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
exa man who was formerly a certain woman's husband
ye
et
esa radioactive transuranic element produced by bombarding plutonium with neutrons

XYSTER