UNI-, MON(O)- Crossword

One person or family that rules an entire country
Mythical creature with one horn
One person’s initials
Vehicle with a single wheel that is driven by pedals
One company that controls an entire industry
A set of identical clothing an entire group wears
The quality of lacking diversity or variation
A train which uses one rail instead of two tracks
Using one tone only
Done by one person
Man committed to living as one (vs. becoming married)
Composed of one legislative body
speech given by one person
Make as one
/one syllable
/a making of one from different parts
/system of government using one ruler
/something of which there is only one
/an eyeglass for one eye
/doing something as one
/a painting, drawing or photograph in a single color