Term morphology is handled several ways:
Word stem separation
By default, the match type for new terms is set to Fuzzy.
When the match type is, a suffix can be appended to a word and it will still be matched.
Fuzzy match might not be suitable for words such as contract as contractor would be an incorrect match. This term would be better served with Exact match settings
Exact match is also recommended for abbreviations; AN may require an Exact match and also be Case sensitive. Only AN would provide and exact match while an, and or AND would not.
To improve matching for terms with rich morphology as when part of a word changes due to context, a boundary between the word stem (the part that does not change) and the suffix (the part that does change) can be defined by inserting a pipe character
Fuzzy terms are recognized up to a maximum of 5 characters after the pipe character.
For some terms, the fuzzy match or separating stem will not work; leaf and leaves would not match in one term. In such case, use synonyms.