The SDK will be updated to 7.0 after Bot Libre 7.0 is released.
This should occur in the next couple months.
Bot Libre 7 will have support for synonyms, compound words, regular expressions, and a lot more.
In 6.1 you can overload keywords (i.e. "student students"), or label the response and add multiple questions for the same label.
what if i am a student
what about students
Students can register for free.
keywords: student students