The phrase "do part" can be used to mean fulfilling one's responsibilities or playing one's role in a task or situation. Synonyms for this phrase include "carry out," "execute," "perform," "complete," "fulfill," "accomplish," "achieve," and "succeed." All of these words emphasize the importance of taking action and achieving success in a given task or responsibility. Other words and phrases that could be used as synonyms for "do part" include "do one's share," "hold up one's end," "make one's contribution," and "pull one's weight." No matter the phrasing, the underlying message is one of responsibility and accountability.