odinism

from The Century Dictionary.

• noun The worship of Odin and other deities of Northern mythology; the mythology and religious belief of the ancient Scandinavian and Germanic races before the introduction of Christianity.

from the GNU version of the Collaborative International Dictionary of English.

• noun Worship of Odin; broadly, the Teutonic heathenism.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The modern name given to the Pre-Christian faith of Northern Europe as practiced by such groups as Angles, Saxons, Jutes, Vikings etc. Also known as Wodenism, Wotanism, Asatru, Heathenism, Norse Paganism and other names.