Do you know
* Do you know that "Dreamt" is the only English word that ends in the letters "mt"
* Do you know that "underground" is the only English word that begins and ends with "und"
* Do you that the longest one-syllable word in English is "screeched"
* Do you know that there are only four words in the English language which end in "-dous": tremendous, horrendous, stupendous, and hazardous.
* Do you know that there is a seven letter word in the English language that contains ten words without rearranging any of its letters, "therein": the, there, he, in, rein, her, here, here, ere, therein, herein.