I wrote a riddle for a word about a year ago. I don't know how hard it is, but it becomes pretty obvious after you know the answer. Here it is:
River, Sing, Emit Rear, Ranging, Mite An acronym of its measurement Is the first of synonym It does not have a synonym It does not have an antonym Its anagram appears twice Its clues are a homonym When it's over, it is up It controls us - a reality We control it - a fantasy, imagination Three of its letters appear in every line Its third letter is missed in three What is the word that has been mentioned?
There is no spelling, grammatical or formatting mistake, any such 'mistake' could be intended.