The vowel sounds /aʊ/ and /ɔɪ/

/aʊ/

found

now

cow

boy

ɔɪ/

annoy

boycott

joy

oyster

avoid

recoil

oil

toil

toilet

enjoy

choice

coin

alkaloid

appoint

asteroid

disappoint

disjoin

exploit

hoist

humanoid

invoice

loiter

moist