Pronunciation of diphthongsVersión en línea Match the words and their key vowel sounds. por Karel Beneden 1 Group 1 2 Group 2 3 Group 3 4 Group 4 5 Group 5 6 Group 6 7 Group 7 8 Group 8 powder /aU/ pie /aI/ poison /ɔI/ potion /əU/ poor /Uə/ pay /eI/ pier /Iə/ pair /eə/