noun
bookworm
BOOK-wurm/ˈbʊkwɜːrm/
A person who reads a great deal.
The bookworm reads in an armchair beside a stack of books.

Etymology
A person devoted to study became, by extension, someone who spends a great deal of time reading.
More examples
- As a child, he was a devoted bookworm.
- The library is a favorite refuge for bookworms.
Forms
bookworm · bookworms
Similar words
- reader
- Does not necessarily imply unusually frequent reading.
- bibliophile
- Emphasizes love of books, sometimes including collecting them.