The three words below can be changed phonetically into new ones in the same way. Can you determine the phonetic change and the new words?

WIND
DEEP
JUNE

The long O sound, in various spellings,  can be added to each word to form a new one:

WINDOW
DEPOT
JUNEAU

Credit: LA Times Crossword
July 19, 2015
Frank Virzi
"OH, I GET IT!"