The /oɪ/ sound is spelled with <oi> or <oy>.
As /oɪ/ is fairly rare, only occurring in 784 words in the dictionary, this was a fairly easy list to work out manually. The /oɪ/ sound is usually stressed, which means that removing it rarely leaves a free-standing word. A number of pairs arise from -ing forms of verbs, such as foiling/fling. Notice how both cloying and coiling come down to cling when the /oɪ/ is deleted. The pair coyote/coat only works for the two-syllable pronunciation of coyote.
The density value is 2.1%. The set makes 14 semantic distinctions, giving a loading of 82%.
alloy Al annoy an boiling bling borzoi bores carboy carb cloying cling coiling cling coyote coat coyotes coats doyenne den doyennes dens foiling fling foyer fey gargoyle gargle gargoyles gargles soiling sling toying ting
Credit: John Higgins