The term 'UPPER CANINE' is a combination of two words, 'UPPER' and 'CANINE'. The first word, 'UPPER', refers to the UPPER part of the mouth, while the second word, 'CANINE', refers to the type of tooth found in the UPPER part of the mouth. The crossword solution for this term is 'EYETOOTH', which is an 8-letter word. An EYETOOTH is a type of CANINE tooth that is located in the UPPER part of the mouth and is used for biting and tearing food. It is also known as a cuspid or a dog tooth.