"A leading opponent for the online poker industry..."
opponent
Pronunciation: \ə-ˈpō-nənt\
Function: noun
Etymology: Latin opponent-, opponens, present participle of opponere
Date: 1560
1 : one that takes an opposite position (as in a debate, contest, or conflict)
2 : a muscle that opposes or counteracts and limits the action of another
proponent
Pronunciation: \prə-ˈpō-nənt, ˈprō-ˌ\
Function: noun
Etymology: Latin proponent-, proponens, present participle of proponere
Date: 1588
: one who argues in favor of something : advocate
Other than the lousy writers and editors, this site is great!