We don't have synonyms for umlat yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are umlaut, mlat and umat.
°(linguistics) An assimilatory process whereby a vowel is pronounced more like a following vocoid that is separated by one or more consonants.
°(linguistics) The umlaut process (as above) that occurred historically in Germanic languages whereby back vowels became front vowels when followed by syllable containing a front vocoid (e.g. Germanic l?si > Old English l?s(i) > Modern English lice).
°(linguistics) An assimilatory process whereby a vowel is pronounced more like a following vocoid that is separated by one or more consonants.
°(linguistics) The umlaut process (as above) that occurred historically in Germanic languages whereby back vowels became front vowels when followed by syllable containing a front vocoid (e.g. Germanic l?si > Old English l?s(i) > Modern English lice).