M3O1N1O1P3H4T1H4O1N1G2S1
23 points
MONOPHTHONGS is validvalid
MONOPHTHONG, [n]
MONOPHTHONG, two written vowels representing a single sound, e.g. 'oo', 'oa' [n]
MONOPHTHONG, [n]
MONOPHTHONG, two written vowels representing a single sound, e.g. 'oo', 'oa' [n]