Lemmatization in linguistics is the process of grouping together the different inflected forms of a word so they can be analyzed as a single item.
The process for reducing inflected words to their stem.
"You can also user a stemming which is a simpler version of lemmatization"
from question "Detect words with the same root"
"Lemmatization should lead to better results than stemming source"
from question "What other alternative are there to stemming?"
"Lemmatization is relatively more complicated as compare to stemming that is why it s harder to find some ready and free solution"
from question "Is there a lemmatizer for PHP?"