Tough quiz! I love analogies. Got 15/20, should have gotten 17. Couldn't spell Hieroglyphics for some reason and typed Sparta for Leonidas because I didn't read the question correctly.
Not so sure about your Robin, Maurice and Barry link. They are all brothers (Brothers Gibb) so I was trying to think of a band with 3 brothers, two of which were John and George - couldn't do it. This might have been better if another siblings band had been used instead of the Beatles.
I typed thyroid, but wasn't clever enough to get neck. But I spelled "corgette" instead of "courgette," too. And I misinterpreted the Leonidas question...but my failings all seemed reasonable when the truth was revealed.
Peter Boyle? Young Frankenstein, but still a Frankenstein's monster
and today I learned what a spoke is.
also the goitre was almost beating me, I just got it by trying several body parts