Sclerous is a word that is used to describe something that is hard or tough. Some synonyms for this word include rigid, stony, unyielding, and inflexible. Additionally, other words that can be used as synonyms for sclerous include callous, insensitive, and indurate. Using these different words can help to add variety and interest to writing, making it more engaging and memorable for readers. When trying to choose the best synonym for sclerous in a given context, it is important to think about the specific meaning of the word and to consider the tone and style of the writing in question.