There are several lists, each of which is community generated and a work in progress. Since Monero technology continues to evolve, there will always be a need to add additional terms, and in some cases depreciate old ones that are no longer used.
This stack has a list of Monero tags that is continually user updated with new and improved definitions
Moneropedia on the official Monero website has many important definitions but is in need of more. Community members are encouraged to build upon the current Moneropedia list.
The Monero and CryptoNote wikipedia pages are also helpful community generated resources for learning the meaning of Monero terminology.