Heterohomograph?

In linguistics, a "homograph" refers to words that are spelled the same, but have different meanings, such as "stalk" or "bear."

Since the opponents of marriage equality seem to be hung up on the word "marriage," how about if we just define "marriage" as a homograph? In fact, if it makes them happy, a heterohomograph -- that would be words that are spelled the same but mean opposite things?

My sense is that the ones who are truly hung up on the word "marriage" being theirs alone are just as hung up on fully equivalent civil unions, too.