Answer:
assignment: a piece of work that you are given to do (example, homework)
whole: 1. all of something (example, She ate the whole cake by herself)
2. complete and not divided or broken into parts (example, the bird opened it's mouth and ate the fish whole)
eighteen: the number 18 (example, He bought eighteen books to use for school)
written: past participle of write. Write: mark on a surface on paper with either a pen or pencil. Compose for written or printed reproduction or publication. (example, the book was written fifty years ago)
know: to have information about something in your mind (example, He knows a lot about Geography)
ghost: the spirit of a dead person that some people can see or feel. (example, The girls believe that there is a ghost in the bathroom)
knowledge: information that someone knows about something ( Her knowledge of World History is impressive)
design: (many meanings so I'll only metion one) to draw or plan something that will be made, done or built (example, the school's previous design looked like a hospital)