"Buildup" is typically written as a single word when referring to the accumulation of something, such as in "the buildup of pressure." However, it can be hyphenated as "build-up" in certain contexts, particularly when used as a noun in more formal writing. In general usage, the unhyphenated form is more common.
Yes, it should be hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
yes check-up should be hyphenated
It should be hyphenated.
Yes it should be hyphenated.
"Field" is not hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
No it shouldn't be hyphenated.
Self-made should be hyphenated.
Yes, "low-to-intermediate" should be hyphenated when used as a compound modifier before a noun.