Firstly

It's so hard isn't it. My little one is in kinder this year and I think I hold my breath every day that he goes.

It's great that he felt he could tell you the first incident - it shows that he is comfortable enough to tell you and allow you to deal with it. Perhaps the fact that he didn't tell you about the verbal stuff means that maybe it didn't bother him? Different kids have different perceptions in the playground, so maybe what the other child perceived as him being verbally abused, rolled straight off your son's back. I've always been so surprised at how boys speak to each other (even DH and his friends) but they seem to interact very differently than girls and it doesn't bother them. I guess you can only ask him and see what he says.

Last year when DS was in 3 yr old kinder he came home a few times saying "such and such won't let me play with him, such asnd such keeps taking the toy I was playing with". I had a quiet chat to his teacher just to get her perspective on it (I didn't think he was being bullied, I just wanted to see what was actually happening and also to get advice from her as to how to respond) and she was brilliant. Over the next couple of weeks she encouraged him to get involved more and also encouraged the other boys to include him and now they all get along great. So my advice is don't stew on it, it never hurts to touch base with the teacher and get their perspective.

I feel your pain, it's so hard to let them leave the safety of home and go the the schoolyard. Give him a big hug and let him know how special he is and it's about the best thing you can do x