Shoebox, one word.
It is not one nor two words. It is hyphenated, just as it is written in the question.
Businessmen is often written as one word. It can be two words or even hyphenated
They are called "compound words."
It is properly written ALL DAY - two words.
Bubblegum is one word.
This is spelled shoe box - two words ("shoebox" is not in the dictionary and would be a misspelling). Although many two word-combinations end up becoming compound words rather than two separate words, some are still only used as two separate words.
Contracted words.
Chess player is written as two words.
No I am not a shoebox here are two reasons i cant be a shoebox 1.) shoe boxes cant think 2.) shoe boxes cant type 3.) shoe boxes aren't living
Two words.. one hundred.
"all day" is typically written as two separate words.
One and two hundredths.
It is not one nor two words. It is hyphenated, just as it is written in the question.
Businessmen is often written as one word. It can be two words or even hyphenated
"All right" is written as two words and "already" is one word.However, "alright" (the informal variant of all right) is written as one word.
Underdeveloped should be written as one word, not two words or hyphenated. I hope this answered your question. :)
They are called "compound words."