Saxicolous is a word that is not commonly used. It refers to things that grow or live among rocks or stones. If you are looking for synonyms for this word, you may want to consider using phrases such as "rock-dwelling" or "stone-dwelling." Other options include "rock-loving," "rock-inhabiting," "rock-residing," or "rock-settled." Additionally, you could also use the phrase "living amongst rocks" or "growing amongst stones" to convey the same meaning. Overall, there are several phrases and words that you can use instead of saxicolous depending on the context and the message you want to convey.