The spelling of "Gozzard" can be explained using the International Phonetic Alphabet (IPA). The first sound, /ɡ/, is a voiced velar stop, made by blocking the airflow at the back of the mouth with the tongue. The following sound, /ɒ/, is an open-mid back rounded vowel, formed by lowering and rounding the back of the tongue. The next two sounds, /z/ and /ɑː/, are voiced alveolar fricatives and open central unrounded vowels respectively. Finally, the last sound, /d/, is a voiced alveolar stop made by tapping the tongue against the alveolar ridge.
One who tends a flock of geese or keeps them.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.