1-Syzygy
Amazingly, the only English word with three Y's also happens to describe a rare astronomical event involving three heavenly bodies. A syzygy is the alignment of three celestial bodies in a straight line, commonly the earth,the sun and the moon
2-Dreamt
This past tense of dream possesses a very special quality.The only verb in regular english usage to end with -mt. we hear from people constantly who swear there must be another term ending in -mt. No one has ever actually offered a second example ,however.
3-Tmesis
The sole term in the english language to begin with tm- ,has an unusual meaning to match. Tmesis is the insertion of one or more words between the words that make up a compound phrase, as in "what-so-ever" inserted in the middle of "what-ever".
4-Hydroxyzine
Only one word in all of English has an X, Y, and Z in order. Hydroxyzine.This medication developed in the 1950s can help calm you down and prevent sneezing.
5-Queue
queue is the only word whose pronunciation remains the same when the last four letters are removed.Before it meant a line, a queue referred to the tail of a beast in medieval pictures and designs. The unusual spelling owes its origin to French, like many words that look a little odd in English. Prior to the Frenchification of queue, Latin spelled it simply as coda. The duplication of U and E often feels like waiting in line.
