All synonyms are Deployed at the same time. When editing your TestCase/Verb, you can click the green checkmark Icon called "Validate" to see what is missing or incorrect in the TestCase/Verb. This provides a Validation Report. Click on each item in list and it will take you to directly to where the validation error is. This needs to be done on all synonyms to "Validate" that all the synonyms are OK or there will be a Validation error when you deploy.