The phrase "I am ears" is typically used to convey that someone is listening intently and paying close attention. There are several synonyms that can be used to express the same sentiment, including "all ears," "attentive," "engaged," "focused," and "observant." These words all convey a sense of interest and concentration. Additionally, phrases like "hanging on every word" or "taking it all in" can also be used to express the same concept. Whether in a professional setting or in a personal conversation, using these synonyms can help convey a deeper level of engagement and understanding.