I don't think Amara Prabhu needs to come up with proof about whether there is a sanskrit word for 'homosexual'... There shouldn't be a debate about what is the correct sanskrit word. Who cares? The fact is that there is a group of devotees who feel excluded, ridiculed and mistreated. That's the only thing that matters and should be resolved. Sticking the correct sanskrit-word on a group of devotees really doesn't make any difference for them.
Just my (not so humble) opinion,