I googled male pig word
and got results that said the word was boar. I thought, "That's odd; I thought that was the word for a wild pig!" So I visited Dictionary.com and sure enough, it has both meanings:
boar [bawr, bohr]
noun
1. the uncastrated male swine.
2. wild boar.
adjective
3. South Midland and Southern U.S. (of animals) male, especially full-grown: a boar cat.
So I was wondering, since there exists a term that only means female pig--sow, does such a word exist that only means male pig and nothing else? I'm looking for a unique term.