Subtraisuries or Subtreasuries: How To spell?

The word Subtraisuries is misspelled against Subtreasuries, which is plural of "Subtreasury"

Subtreasuries has vowels 'ea' together mispronounced as 'ai'
Word contains consecutive vowels 'EA' in between alphabets subtr & suries is misspelled as 'AI'
Wrong Spelling:  subtr-ai-suries 
Correct Spelling:  subtr-ea-suries 
Check more misspelled words of Subtreasuries to spell it correct.

You might be interested to know

Taicup or Teacup?

Thairchy or Thearchy?

Toyair or Toyear?