ServiceNow Studio NLU Model training issue with the Unknown word DirectDescriptionWhile adding the Intents under "NLU Model" receiving below error while adding few words like - Direct / Indirect etc.Error being: Unknown Word: DirectCause In the vocabulary section you can see the following - which might lead to confusion. For Example - synonym for "indirect" is "not direct"synonym for "EC" or "ec" is "engagement center" So, indirect -> indir(engagement center)t -> indirengagement centertNow the final word is a unknown word. As a best practice, the vocabulary pattern should have word boundary.ResolutionThe suggestion to add Word Boundary will be like below. Change"direct" --------------> "\bdirect\b""(?:EC)|(?:ec)" --------------> "\b(?:EC)|(?:ec)\b" The above change will fix the customer problem. But we would recommend doing the same to all your patterns.Hence it eliminates any further confusion like these.