I'm aware that ejaculate can be a noun, but it is so rarely used as one (outside a medical context) that, as I had undertaken to treat your response seriously, I assumed that that was not the meaning you had intended. "Urination" is hardly a term limited to medical or technical contexts, nor is "semen", and I don't really find anything silly about my suggestions. From the looks of it, plenty of people agree with me. I'm not going so far as to, for example, suggest an alias from pussy to vulva, since a surprisingly large number of people (erroneously) call it a vagina, but even that is not nearly as far fetched as "ejaculate" (the noun).