There isn't in any formal way.
All of those word usages are colloquial, usually by the groups themselves. Note: I am not homosexual(i am in fact pansexual!) but i do know some history of the terms. Firstly, as you probably know, "gay" used to mean "happy, cheery" etc. Around the 60's homosexual males chose to use the term to describe themselves; Likely to reclaim it after it was being used as pejorative. The word "queer" arose with similar connotations: It was originally used as an insult. The community later chose to reclaim the term and defuse its original intention.
The word "lesbian" used to mean "things from Lesbos," especially wine, until the early 19th century. After that point its meaning shifted to "mentally ill woman with non-traditional gender role," likely influenced by Sappho's writings, though at that time it had nothing to do with sexuality, just gender roles. The use by female homosexuals is relatively recent, like "gay." The difference is that it still doesn't universally mean "female homosexual" to everyone, and there is some resistance to the word. To some people, that i personally know, it still means "woman with non-traditional gender role" and some of the self-described lesbians are actually bisexual.
TLDR: They were words used by other people, then later reclaimed and subverted. But the fact is:
In formal language, the ONLY word used to describe a homosexual in terms of sexual orientation is "homosexual." Everything else is colloquial. I know you'll be shocked to hear this: Women and men have through-out history been treated differently. Therefore different terms. Equality is a relatively recent concept.
/E: As far as the poll goes, i believe neither in chastity, or marriage, so i'm going to asnwer "no."
When people say its wrong because God created men and women, does that mean its unchaste or simply unnatural? Maybe living together before marriage is wrong not because of boundaries but because of an order to things. People dont refer to someone being gay as living together before marriage, but similar to a heterosexual couple, they arent husband and wife.