in-house - two words, hyphenated.
Pre construction - two words not hyphenated.
No it is not hyphenated. They are two separate words.
Self-made should be hyphenated.
No it's not hyphenated but it's two separate words - jump start.
They are two words conjoined to be one.
When originally made, Go Kart was two words. however the hyphenated words are just as acceptable.
Underdeveloped should be written as one word, not two words or hyphenated. I hope this answered your question. :)
Yes, "ordinary-looking" is a hyphenated adjective. The two words do not separately modify the subject.
Yes, "special-needs" is a hyphenated adjective. The two words do not separately modify the subject.
it is just two separate words
it should be hyphenated: close-out