Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Ancient Greek φθόγγος
Ancient Greek φθέγγομαι (mention)

English diphthong (mention)
English monophthong (mention)
English triphthong (mention)
English phthongal (mention)
Ancient Greek δίφθογγος (affix)
Ancient Greek φθέγγομαι (mention)
Ancient Greek τρίφθογγος (affix)
Ancient Greek μονόφθογγος (compound)
Ancient Greek φθογγήεις (suffix)
Ancient Greek λιγύφθογγος (affix)
Ancient Greek γλυκύφθογγος (affix)
Ancient Greek ὑγρόφθογγος (affix)
Ancient Greek ἄφθογγος (affix)
Hungarian diftongus (mention)
Italian quadrittongo (mention)
Latin phthongus (derived)
Latvian diftongs (mention)
Latvian triftongs (mention)