Underprof or Underproof: How To spell?

The word Underprof is misspelled against Underproof, an adjective meaning "Containing less alcohol than proof spirit. See Proof spirit, under Spirit."

Underproof has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings underpr & f which should not be misspelled with single 'O'
Wrong Spelling:  underpr-o-f 
Correct Spelling:  underpr-oo-f 
Find more incorrect spellings of Underproof to spell right way.

You might be interested to know

Whot or Whoot?

Woed or Wooed?

Zocytia or Zoocytia?