Neither. The term is two separate words.
No. Neither film star or movie star are single words, except that they might be hyphenated if used as an adjective (e.g. his film-star looks).
The term is almost always hyphenated all-star.
It is one word according to Webster dictionary. it is one word but it can be hyphenated it wanted to (Table-Cloth)
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.
in-house - two words, hyphenated.
It should be hyphenated.
No it shouldn't be hyphenated. It is one word.
Hyphenated
It is a hyphenated adjective, life-giving.
Coordinate is one word.
One-half is a hyphenated word. It begins with the letter O.
No, "wholeheartedly" is one word.