Question: list of words that are difficult to pronounce?
Answer: 10 - Rural. Submitted by user 'mattythedog', rural appears to cause problem particularly when repeated or put next a word with similar “r” sounds. ...  9 - Otorhinolaryngologist. ...  8 - Colonel. ...  5 - Isthmus. ...  4 – Anemone. ...  3 - Squirrel. ...  2 – Choir. ...  1 – Worcestershire.