I was thinking Chinese Tallow Tree too. They grew all around Savannah when I lived there.
Where do you live? Tallow trees can't take too much cold....you can get tallow from the fruit. It was used in colonial times for candles.
It is not a Bradford Pear.
Eric, the bradford pears have weak structure(very steep limb angle) but the wood is strong like any other Pyrus(pears).