No word in the English language rhymes with month

 

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Dreamt" is the only English word that ends in the letters "mt".

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"Underground" is the only word in the English language that begins and ends with the letters "und."

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The longest one-syllable word in the English language is "screeched." 

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There are only four words in the English language which end in"-dous": tremendous, horrendous, stupendous, and hazardous.

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The longest word in the English language, according to the Oxford English Dictionary, is pneumonoultramicroscopicsilicovolcanoconiosis