There are various synonyms for the phrase "getting tired" that can help you to add some variety in your writing. Some of the examples of such synonyms include "fatigued," "exhausted," "weary," "drained," "spent," "worn-out," "listless," "lethargic," "drowsy," and "sleepy." Each of these words has a slightly different connotation and can be used based on the context in which you are writing. For instance, "fatigued" can be used to describe a physical state of exhaustion, while "weary" can describe both physical and emotional fatigue. Using synonyms can help to make your writing more captivating and engaging.