I found a page in Japanese with title "世界でもっとも汚染された10の都市". Having encountered the phrase 「もっとも」 for the first time, I looked it up on WWWJDIC and found two entries:
尤も 【もっとも】 (adj-na,adv,conj,n) quite right; plausible; natural; but then; although;
最も 【もっとも】 (adv) most; extremely;
Since the page is about world's dirtiest cities, I assumed that the もっとも used in the page title is the second one 最も that means "most, extremely". However, should I have not known what the page is about, I think I would have not known which of the two もっとも is the one used in the title since both of them can be used an adverb. Since WWWJDIC example sentence for 尤も is using it as a noun, I tried to look for sample sentences that use 尤も as an adverb with not much luck.
Are there scenarios where 尤も is commonly used as an adverb? If it's rare, is it safe to assume that if もっとも is used as an adverb in a sentence, it is most probably 最も, otherwise if it's not used as an adverb it is most probably 尤も?