There were many follow-ons to the original proposal.

I always prefer to pay for my meals on my own bill.

There were several walk-ons at the audition.

He argued one-sidely without considering the other person's perspective.

The striker's flick-ons were crucial in creating goal-scoring opportunities for his teammates.

There were so many come-ons at the party last night.

They became one flesh when they got married.

I'll have a tall one, please.

The hotel we stayed at last night was one-star.

They are one in the same.