Slippiness refers to the quality of something being smooth or slippery, making it difficult to grip or walk on. There are many synonyms for this word that can be used interchangeably in different contexts such as slickness, slipperiness, greasiness, smoothness, and lubricity. Each of these synonyms has a slightly different meaning and application, but they all convey the concept of slip, especially in wet or icy conditions. Some other related words to slippiness include skid, slide, and glide, which all have an element of smooth gliding or movement. Overall, having a variety of synonyms for the word "Slippiness" can help to add depth and clarity to written and spoken communication.