When you disregard order, limitation, or control, you're acting without restraint. There are numerous synonyms for the term "without restraint," which can be used instead of the word to give variety and depth to your writing. Here are some of the best nouns and adjectives that can be used as substitutes for "without restraint": freely, unconstrained, unbounded, unchecked, uncontrolled, uninhibited, unrestrained, unbridled, open-handed, lavish, liberal, wild, careless, impulsive, spontaneous, and rash. So, next time when you're drafting your essay or composing an email, try to replace "without restraint" with one of these words, and see how it transforms your writing by making it more precise, informative, and engaging.