All terms used in the definition list should correspond to terms used in the rest of the document.
A quick way to check for this is to go down the list of terms and use the search functionality, combined with the “Match case” option, to search for capitalised instances of the words in the definition list.
Capitalised terms in the rest of the document should conversely make an appearance in the definition list or should be defined in-line.
Finally, some defined (i.e.: capitalised) terms will be used in the document without a capital letter. This can be done with good reason, but it’s important to double-check whether it is necessary. For example: the term “the Services” can refer to an exhaustively defined list of services and be used alongside the term “the services”, which refers to any other service that fall outside that limited scope.