When it comes to finding alternative words for the phrase "be loose", there are several synonyms available. For instance, you can use the words "relax", "chill", "unwind", and "let go" to indicate a relaxed and carefree state. Another option is to use the words "not rigid", "not tight", "slack", or "limp" to refer to a lack of tension or firmness. Furthermore, terms like "liberal", "lax", "flexible", and "lenient" are also synonyms for "be loose" that convey a sense of looseness or freedom from rigid restrictions. In summary, there are many words that can be used instead of "be loose", depending on the context.