flip·book 
(flĭpbk′)
(flĭpbk′)n.
A small book consisting of a series of images that give the illusion of continuous movement when the edges of the pages are flipped quickly.
- obstacle course
- obstetric
- obstetrical
- obstetrically
- obstetrician
- obstetrics
- obstinacy
- obstinate
- obstinately
- obstinateness
- obstipation
- obstreperous
- obstreperously
- obstreperousness
- obstruct
- obstructer
- obstruction
- obstructionism
- obstructionist
- obstructionistic
- obstruction of justice
- obstructive
- obstructively
- obstructiveness
- obstructor