Hi,
Teachers
Is there any word which start with S and second word should be D, G, B?
Do you mean second letter?
Or second sound?
Not really- you could possibly make a case for 'sblood, though that has an apostrophe at the start. My dictionary has sdeign and sgraffito, though I have never seen them in use.
Sbarro
There is an Italian restaurant chain in the US called "Sbarro." That's a proper name, of course and not a "dictionary word."
However, all of these words start with the sound /z/, not with the sound /s/.