Singlehanded is a term used to describe something that is done alone or with only one hand. There are several synonyms that can be used for this word to describe similar actions. Solo, solitary, unassisted, unaided, lone, isolated, and independent are all words that can be used in place of singlehanded. These synonyms convey the meaning of an action or task that is performed without the assistance or support of anyone else. Whether it be sailing a boat alone, completing a project without help, or accomplishing an achievement on your own, these synonyms can be used to describe the act of doing something singlehanded.