The word 'is fascinated' can be replaced with a number of synonyms that convey similar meanings. 'Is captivated' speaks to the sense of being drawn in and held rapt by something, while 'is mesmerized' suggests being entranced or hypnotized by something. 'Is enthralled' conveys a sense of being completely absorbed and fascinated by something, while 'is spellbound' suggests that something has captured one's attention so completely that they are almost under its magic. Other synonyms for 'is fascinated' include 'is intrigued', 'is engrossed' and 'has a keen interest in'. All of these words convey a sense of intense curiosity and engagement with whatever is being referred to.