The schwa-glide that is inserted by pre-l breaking in words like rule creates a monosyllabic vowel sequence that is phonetically very similar to the disyllabic sequence that occurs in words like cruel: [ruːᵊɫ] versus [kɹ̥uːəɫ]. Indeed, in the pronunciation of many GA speakers the inserted [ə] may become syllabic through syllable addition, especially after close free vowels and diphthongs. Further examples of such unexpected rhymes are:
rule [ˈruːəɫ]
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cruel [ˈkɹ̥uːəɫ]
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mule [ˈmjuːəɫ]
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fuel [ˈfjuːəɫ]
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foul [ˈfaʊəɫ]
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vowel [ˈvaʊəɫ]
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tile [ˈtaɪəɫ]
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dial [ˈd̥aɪəɫ]
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oil [ˈɔɪəɫ]
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royal [ˈrɔɪəɫ]
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fail [ˈfeɪəɫ]
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portrayal [pʰɔrˈt̠ɹ̥eɪəɫ]
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stole [ˈstoʊəɫ]
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bestowal [b̥ɪˈstoʊəɫ]
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In all of the above examples, glide insertion may apply, especially in the second word of the pairs. The result will be [ˈruːwəɫ, ˈkɹ̥uːwəɫ, ˈtʰaɪjəl], etc
