How to configure synonym chain or to search synonym sentence

[similonpascal]

We use this project to search sentence on indexed text, it's great, thank you.

This work great to get accurate result with semantics. For examples, "I carried out work audits" is indexed, this two queries give same result:

• I carried out work audits
• I carry out work audits

We want to improve the search to get better result based on synonyms : For examples, this 2 queries should return "I carried out work audits" :

• I carry out work audits
• I do work audits

How can we configure that with nboost ?

thanks for your help/assistance.

Pascal