Based on content:
* Specialized book: An encyclopedia covers a broad range of topics, while a specialized book focuses on a specific subject.
* Fiction: Encyclopedias are non-fiction, while fiction is imaginative and made up.
* Personal anecdote: An encyclopedia is factual and objective, while a personal anecdote is subjective and based on individual experience.
Based on format:
* Short story: Encyclopedias are long and comprehensive, while short stories are brief and focused.
* Journal article: An encyclopedia provides an overview of a subject, while a journal article focuses on a specific aspect or research.
Based on purpose:
* Entertainment: Encyclopedias aim to educate, while entertainment aims to amuse or engage.
* Personal opinion: Encyclopedias are objective and neutral, while personal opinions are subjective and biased.
Ultimately, the best opposite for "encyclopedia" depends on the context and what aspect you are emphasizing.