nuzzle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To rub or push against gently with or as if with the nose or snout.
• intransitive verb To root or move with the snout.
• intransitive verb To make rubbing or pressing motions with or as if with the nose or snout.
• intransitive verb To nestle together.

from The Century Dictionary.

• To thrust the nose in or into; root up with the nose.
• To touch or rub with the nose; press or rub the nose against.
• To put a ring into the nose of (a hog).
• To fondle closely, as a child.
• To nurse; foster; rear.
• To nose; burrow with the nose; rub noses.
• To touch or feel something with the nose.
• To go with the nose toward the ground.
• To nestle.
• To loiter; idle.

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

• transitive verb obsolete To noursle or nurse; to foster; to bring up.
• transitive verb To nestle; to house, as in a nest.
• intransitive verb To work with the nose, like a swine in the mud.
• intransitive verb To go with head poised like a swine, with nose down.
• intransitive verb To hide the head, as a child in the mother's bosom; to nestle.
• intransitive verb Prov. Eng. To loiter; to idle.

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

• verb of animals, etc To touch someone or something with the nose.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb rub noses
• verb dig out with the snout
• verb move or arrange oneself in a comfortable and cozy position