When it comes to synonyms for the phrase 'lifting a finger,' there are quite a few options to choose from. Some alternatives include 'raising a hand,' 'making a move,' 'showing initiative,' 'exerting effort,' 'putting in work,' and 'taking action.' These phrases all convey a sense of actively engaging in something and making an effort. Other similar phrases might include 'pitching in,' 'contributing,' 'joining the effort,' 'getting involved,' or 'taking the lead.' Regardless of the specific phrasing used, these synonyms all emphasize the importance of taking action and actively participating in the task or activity at hand.