3.  Adj.  Having one color, something that is only one color or shades of one color

5.  Noun  An eyeglass for one eye

7.  Adj.  Speaking or writing only one language

9.  Noun  Something made out of one single large block or piece of stone

11.  Noun  A long speech given by one person

13.  Noun  An abnormal fear of being the only one there; fear of being alone

15.  Noun  Control of a product or service by one company

17.  Noun  A track for subway or train cars that only has one rail

19.  Adj.  Having only one syllable

21.  Noun  A speech in which every word has one tone of voice