Hyphenated
Yes, end-product is hyphenated. It is a noun and treated as one word which is hyphenated.
"Year-end" is typically written as two words when used as a noun, such as "the year-end is approaching." However, it can also be hyphenated as "year-end" when used as an adjective, like in "year-end report." So, its usage depends on the context in which it appears.
Hi-fi is technically one word as it's hyphenated.
in-house - two words, hyphenated.
It should be hyphenated.
No it shouldn't be hyphenated. It is one word.
It is a hyphenated adjective, life-giving.
Coordinate is one word.
"Reuse" is one word.
One-half is a hyphenated word. It begins with the letter O.
No, "wholeheartedly" is one word.
No...heartbeat is one word.