[lkbm]

On one hand, yes, I believe third wave feminism and radical feminism are divergent (third wave being an inclusionary branch), but according to Wikipedia, anyone who recognizes and opposes the patriarchy is a radical feminist, so one could reasonably consider third-wave to be a sub-type of radical feminism. (I think if you used the term "radfem", that would be more clearly distinct from third wave feminism--that term seems used along with terms like "terf".)

Disclaimer: I'm not very well educated on this at all.