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Did you mean sea squirt?

Suggestions:
sea squirt
Esguard
Escouade
ice skate
ice-skate
upsurged
isosorbide
Arsacid
Esocidae
Szeged
escudo
Enschede
Assized
assuaged
exiguity
assessed
overskirt

I find my life is becoming increasingly surreal...

UPDATE: Dark_Brood pointed out that M-W also fails, although not in quite as humorous of a manner:

The word you've entered isn't in the dictionary. Click on a spelling suggestion below or try again using the search box to the right.

Suggestions for user's guide:

  1. assurors
 2. as regards
 3. assorted
 4. assessors
 5. exorcised
 6. exorcized
 7. accessorized
 8. ogresses
 9. ozonized
10. isomerized