hydrostat

1. A contrivance or apparatus to prevent the explosion of steam boilers.

2. A device, usually electrical, for indicating or regulating the height of water in a reservoir or receptacle.

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Here are some other words you could make with the letters hydrostat

Top Words by points	Points	Word Game
hydras	13	Scrabble

2 Letters	Scrabble® Points
ad	3
ah	5
ar	2
as	2
at	2
ay	5
da	3
do	3
ha	5
ho	5
od	3
oh	5
or	2
os	2
oy	5
sh	5
so	2
ta	2
to	2
ya	5
yo	5

3 Letters	Scrabble® Points
ado	4
ads	4
ahs	6
ars	3
art	3
ash	6
att	3
ays	6
dah	7
das	4
day	7
doh	7
dor	4
dos	4
dot	4
dry	7
had	7
hao	6
has	6
hat	6
hay	9
hod	7
hot	6
hoy	9
oar	3
oat	3
oda	4
ods	4
ohs	6
ora	3
ors	3
ort	3
rad	4
rah	6
ras	3
rat	3
ray	6
rho	6
rod	4
rot	3
rya	6
sad	4
sat	3
say	6
sha	6
sho	6
shy	9
sod	4
soh	6
sot	3
soy	6
sty	6
tad	4
tao	3
tar	3
tas	3
tat	3
tho	6
thy	9
tod	4
tor	3
tot	3
toy	6
try	6
yah	9
yar	6
yas	6
yod	7
aro	3
ats	3

4 Letters	Scrabble® Points
ados	5
ahoy	10
arts	4
arty	7
ashy	10
dahs	8
dart	5
dash	8
dato	5
days	8
doat	5
dohs	8
dors	5
dory	8
dosa	5
dosh	8
dost	5
doth	8
dots	5
doty	8
drat	5
dray	8
drys	8
hard	8
hart	7
hast	7
hats	7
hays	10
hoar	7
hods	8
hora	7
host	7
hots	7
hoya	10
hoys	10
oars	4
oast	4
oath	7
oats	4
oaty	7
odah	8
odas	5
orad	5
orts	4
osar	4
rads	5
rash	7
rath	7
rato	4
rats	4
rays	7
rhos	7
road	5
rods	5
rosy	7
rota	4
rots	4
ryas	7
ryot	7
sard	5
shad	8
shay	10
shod	8
shot	7
soar	4
soda	5
sora	4
sord	5
sort	4
soth	7
soya	7
star	4
stat	4
stay	7
stoa	4
stot	4
tads	5
tahr	7
taos	4
taro	4
tars	4
tart	4
tats	4
that	7
thro	7
toad	5
tods	5
tody	8
tora	4
tors	4
tort	4
tory	7
tosa	4
tosh	7
tost	4
tots	4
toys	7
trad	5
tray	7
trod	5
trot	4
troy	7
tsar	4
tyro	7
yard	8
yodh	11
yods	8
aros	4

5 Letters	Scrabble® Points
artsy	8
darts	6
dashy	12
datos	6
datto	6
doats	6
dorsa	6
dorty	9
dosha	9
dotty	9
drats	6
drays	9
dryas	9
hadst	9
hards	9
hardy	12
harts	8
hasty	11
hoard	9
hoars	8
hoary	11
horas	8
horst	8
horsy	11
hosta	8
hotty	11
hoyas	11
hydra	12
hydro	12
oaths	8
odahs	9
ottar	5
ratos	5
ratty	8
rhyta	11
roads	6
roast	5
rotas	5
ryots	8
sarod	6
satyr	8
shady	12
shard	9
shoat	8
short	8
shott	8
start	5
stoat	5
story	8
stray	8
stroy	8
tahrs	8
tardo	6
tardy	9
taros	5
tarot	5
tarts	5
tarty	8
tasty	8
toads	6
toady	9
toast	5
today	9
torah	8
toras	5
torta	5
torts	5
trash	8
trays	8
troth	8
trots	5
troys	8
tryst	8
tyros	8
yards	9
yodhs	12

6 Letters	Scrabble® Points
dattos	7
hoards	10
hydras	13
hydros	13
ottars	6
shorty	12
stator	6
strath	9
tarots	6
throat	9
toasty	9
todays	10
torahs	9
tortas	6
trashy	12
troths	9

7 Letters	Scrabble® Points
throats	10
throaty	13