Not in my dictionary, and new to me. "obstreperous" is just as good, and not rare.
In the quote, I suspect use of "himself" may be questionable:
"...while he overhears Juliet's apostrophe of love to himself," Would not "him" be
preferable?

apostrophe of love to himself

That's an interesting point. Even I decry the overuse of the reflexive, but, in this case, it seems to add the information that the him in question is Mr. Anderson. Didn't seem to need it in the previous part of the line, ...as if challenging the household to oppose him..., however.