Stersmate or Steersmate: How To spell?

The word Stersmate is misspelled against Steersmate, a noun meaning "One who steers; steersman."

Steersmate has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings St & rsmate which should not be misspelled with single 'E'
Wrong Spelling:  St-e-rsmate 
Correct Spelling:  St-ee-rsmate 
Explore spell check of Steersmate to spell without errors.

You might be interested to know

Swinery or Swineery?

Treful or Treeful?

Unseming or Unseeming?