Go into the plugin configuration (in the repository / plugin manager)
Define the sets of synonyms you want The synonyms get added in sets. From the configuration page click the button to 'create a new set' and add relevant words that you want associated to that set e.g. 'Adaptavist Adaptivist Adaptvist'. Once you click update that set will be added to the plugins list of synonyms. To see the synonyms that are currently entered you can click the 'Toggle display of synonym sets' link.