Search Result for "headbutt": 
Wordnet 3.0

VERB (1)

1. butt with the head;
- Example: "The soccer player headbutted his oponent and was sent off the field"



WordNet (r) 3.0 (2006):

headbutt
    v 1: butt with the head; "The soccer player headbutted his
         oponent and was sent off the field"