Is there another nut like pine nuts?

Well, it varies from hamster to hamster, but there is no harm giving them pine nuts. Just don't give them too many otherwise they can get diarrhoea which is really bad for them, as fatty nuts and...

Pine nuts are a food. Some people may be allergic to them.

yes

pine nut (an edible seed of any of several nut pines especially some pinons of southwestern North America)

cut the pine cones and get the pine nuts :P Soaking them in water for a few days is less painful. The cone will satruate, open up, & the seeds will float out.