Is there a difference between endometrial cancer & uterine cancer?

Almost synonymous: Uterine cancers are endometrial origin , they are endometrial cancers , some times broader term , uterine cancer is used to include cancers like ca of tubes, sarcomas ( which is mesothelial origin not ectodermal cancer ) , other uterine structures . Physicians use cell specific term , so use the term endometrial cancer.

Endometrial Cancer: The endometrium is the inner lining of the uterus that forms most uterine cancers. The terms are used interchangeably. There are rare sarcomas from the muscle wall of the uterus that can form. However, these are very rare.

Used similarly: The endometrium is part of the uterus. People who are not medical professionals commonly use these terms interchangeably. Endometrial cancer is a more specific term. There are some rare cancers of the uterus which may not be derived from the endometrium, and hence 'uterine' cancer could be thought of a broader term.