In October, Eaker participated in the Worlds Team Selection Camp. During the competition, she placed first on the balance beam, sixth in the all-around, eighth on vault, ninth on uneven bars, and fifth on floor exercise. The following day, she was named to the team to compete at the 2018 World Championships alongside Simone Biles, Morgan Hurd, Grace McCallum, Riley McCusker, and alternate Ragan Smith. During qualifications Eaker qualified second to the balance beam final, behind Biles. The US also qualified in first to the team final. During the team final, Eaker competed on only balance beam. She contributed 14.333, the highest beam score of the night from any competitor, towards the USA's team total. The American team won gold with a score of 171.629, 8.766 points ahead of second place Russia. Although she was favored for a medal in the balance beam final, she placed sixth after falling on her mount.