Homonyms

Can you think of any homonyms?   Homonyms are multiple-meaning words, are words that have the same spelling and usually sound alike, but have different meanings. I'll start off first.  Here goes: 

There are waves.... 

and then there are waves...

and then there are waves!

One word, spelled the same, but meaning totally different things.  Can you think of  homonyms to add here?