can you please explain the distinction between compound word and collocation
A compound word is one word made up of two other words. Examples:
bedroom
Facebook
baseball
fireworks
cannot
http://www.learningdifferences.com/Main%20Page/Topics/Compound%20Word%20Lists/Compound_Word_%20Lists_complete.htm
A collocation is two words that are often used together.
http://www.learningdifferences.com/Main%20Page/Topics/Compound%20Word%20Lists/Compound_Word_%20Lists_complete.htm
http://www.englishclub.com/vocabulary/collocations.htm