SynonymDefinitionAntonym.com - English Synonym Dictionary

A sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin

The part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved

The series of vertebrae forming the axis of the skeleton and protecting the spinal cord

A small sharp-pointed tip resembling a spike on a stem or leaf

Any sharply pointed projection