--Dr.,-- --nth-- (as in --to the nth degree--), and --TV-- also do not contain
any vowel symbols, but they, like --cwm-- and --crwth,-- do contain
vowel sounds. --Shh,-- --psst,-- and --mm-hmm-- do not have
vowels, either
vowel symbols or
vowel sounds.
There is some controversy whether they are in fact --
words,-- however.
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