What’s the best way to handle this?

I have a client with a heading that needs to break between two specific words while still keeping the text relatively large. Since there doesn’t seem to be a way to force a line break within the Heading module itself, do you simply use two Heading modules and split the text between them, or is there a better way to do it?

Also, which unit do you normally use for letter spacing: px, em, or something else?