Verminous is an adjective used to describe something that is infested with or contaminated by vermin, which are small animals such as rats, mice, and other pests. The two crossword solutions for the term verminous are FILTHY (6 letters) and RATTY (5 letters). FILTHY means extremely dirty or unclean, while RATTY means having the characteristics of a rat, such as being dirty, disheveled, or unkempt. Together, these two words can be used to describe something that is infested with vermin, as it would be both dirty and disheveled.