This book is only a novel in the 'loose' sense of the word. [=the word “novel” does not usually refer to a book like this; many people would not consider the book a novel]
Ten advocacy groups from all parts of the country formed a 'loose' alliance/association/coalition to present their shared interests to Congress.
She's been 'cut loose' from her contract. [=the company/organization with whom she had a contract to work has ended the contract]
(..) where that old pimp Tattaglia is hiding. I want him now. Sonny, things are starting to loosen up. If you go after Tattaglia, all hell will break loose. Pop can negotiate. - He must get better first. I'll decide... - War is costly. We can't do business. - Neither can they. Don't worry about it! (..)1972 The Godfather