Stealth is a term often used to describe actions or activities that are hidden or carried out in secrecy. A person who practices stealth or stealthy behavior can be referred to as a stealther. However, there are several synonyms for the term stealther, including surreptitious, furtive, covert, and clandestine. These words all imply a sense of secrecy or ingenuity in carrying out actions without being detected. Other synonyms for stealther include sly, sneaky, and cunning - all of which indicate a degree of deception and trickery. Whether it's a covert operation or a sneaky theft, these synonyms for stealther accurately depict the hidden nature of such actions.