The phrase "grease joints" is often used in the context of machinery maintenance. However, there are several synonyms for this term. Some of these include lubricate, oil, grease up, apply grease, apply oil, gate oil, and slather with lubricant. All of these phrases describe the act of applying a lubricating substance to ensure proper functioning of machinery. It is important to regularly grease joints to avoid wear and tear and prolong the lifespan of equipment. Using these synonyms can help to vary language and make written or spoken instructions more engaging for personnel responsible for machinery maintenance.