"Fired up" is one of those phrases that is hyphenated when it is used as a modifier preceding whatever it is modifying, but not hyphenated when it is used as a predicate adjective. For example, if you say "Everyone was fired up about the new project", "fired up" is a predicate adjective and not hyphenated. However, if you refer to someone's "fired-up speech", "fired-up" is a modifier that precedes "speech" and is therefore hyphenated. Using "fired up" as a predicate adjective is more common.
yes check-up should be hyphenated
It is one word (not hyphenated) when used as a noun and two words when used as a verb:The newspaper featured a weekly roundup of amusing photos.It was time to round up the children and bring them inside.
yes
followup This word spelled as is does not come up on Answers.com spell check. Followup is not hyphenated.
stand-up guy
The term mix-up (noun) is usually hyphenated.
re-up?
A house after set up
In the context "this setup works great!", it is one word. In the context "I have to set up the table still", it is two words. In the context, "it was a set-up, I am innocent!", it is hyphenated.
"Up to" can be two separate words or hyphenated as "up-to."
You should always make the distinction between a compound word (such as homework) which is one word, and a hyphenated word, such as cross-reference, which is listed in the dictionary as one word, but is made from two words. Hyphenated words are two separate words linked to create a new word, or combined to form a common adjective. For example, on-site is an adjective meaning done on the site. Similarly, a low-budget film is neither a low film or a budget film. Hyphens are generally not used for verb pairs such as count down or mix up, but the nouns are one word (countdown, mixup). Some compound words such as makeup and homestyle have hyphenated variants that mean the same thing. Over time, many paired words become hyphenated and later may become one word.
I think the term may be "re-up"