Hey Buddy! I have no problem answering this for you, but in the future, I would encourage you to strike out and do a little bit of research yourself. I only say this because this is a pretty basic question you're asking that can be easily answered with a quick Google search. You can be less dependent upon others and get the information you desire much faster! Just food for thought.
So the sublingual bioavailability of Buprenorphine is usually quoted at around 30% while the intranasal bioavailability is around 50%, so you're looking at essentially doubling the potency by taking the same dosage. Rectal administration has been quoted as high as 60% and I often recommend this route to folks who are considering injecting their Buprenorphine, but that doesn't really apply to you here.
Just be aware that if you become tolerant to this new route of administration it will be difficult to return to sublingual dosing. I'm not lecturing you. I just want you to think about that.