There are only four words in the English language which end in "dous": tremendous, horrendous, stupendous and hazardous.
"Dreamt" is the only English word that ends in the letters "mt".
More Language Facts
There are two words in the English language that have all five vowels in order: "abstemious" and "facetious."
TYPEWRITER is the longest word that can be made using the letters only on one row of the keyboard.