EEPROM is just a type of EPROM - the type where the erasing is done Electrically (as opposed to erasing by UV light, for instance)

"EPROM" is the more general term; without further qualification, it just means any type of Eraseable Programmable Read-Only Memory

Two specific types of EPROM are:

UVEPROM - where the erase is done by UV light;

EEPROM - where the erase is done Electrically

Note that "Flash" is a specific type of electrical erasure technology

Note also that "EEPROM" is sometimes used idiomatically to indicate a device specifically designed for data storage - as opposed to code storage...