When it comes to synonyms for the word 'one-handed', there are a few options to consider. 'Single-handed' is a term that comes to mind, which is similar in meaning and often used interchangeably. Another option might be 'unimanual', which refers specifically to tasks that can be accomplished with just one hand. 'Solo-handed' is another term that can be used in place of 'one-handed', although it may not be as common. Finally, 'mono-manual' could also be used as a synonym, as it relates to actions or tasks that only require the use of one hand. Whatever term you choose, make sure it accurately conveys the intended meaning.