This blog show how to use Contains with Inflectional Matches using the Select query
Syntax:
SELECT TableColumns
FROM TableName
WHERE CONTAINS(TableColumnName, ' FORMSOF (INFLECTIONAL, <Simpleterm>) ')
Example:
SELECT Empid, EmpName
FROM dbo.emptable
WHERE CONTAINS(empName, ' FORMSOF (INFLECTIONAL, THESAURUS) ')