When using products such as lotion, sunscreen, or insect repellent, it's important to apply liberally in order to get the full benefit. However, using the same phrase repeatedly can become monotonous. Some synonyms for apply liberally include slather, spread generously, saturate, coat thoroughly, smother, drench, suffuse, and bathe. Using these alternate phrases can add variety to your language and make your instructions or recommendations more interesting. When encouraging others to use a product, it's important to be clear and concise, but also engaging and informative. Using synonyms for apply liberally can help you achieve this goal.