The term HEAD OF A MUSEUM can be defined as a CURATOR, which is a 7 letter word. A CURATOR is a professional responsible for the care and management of a collection of artifacts or other objects, typically in a museum or library. They are responsible for researching, acquiring, cataloging, and preserving items in the collection, as well as organizing and presenting them to the public. Curators also develop educational programs and activities related to the collection, and may also be involved in fundraising and grant writing.