Answer:
One difference between,
a glossary and an index
is that,
One is an alphabetical list of vocabulary words (Definition of a Glossary)
While the other is a keyword list of topics (names, subjects, locations, etc.) | (Definition of an Index)
Step-by-step explanation:
A glossary is an alphabetical list of vocabulary words used in a written document with their corresponding definitions. It appears after the last page of text and is a useful reference for readers who encounter specialized language that they are not familiar with.
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An index is a keyword list of topics (names, subjects, locations, etc.) discussed in a text with corresponding page numbers. It is presented in alphabetical order and usually appears at the very end of a written document.