Yes, grazier is a common noun, a word for any grazier.
A common noun can become a proper noun if it is used for the name of a specific person, place, thing, or a title, such as Grazier Photography, Inc. in Boxton MA, or the Grazier Cemetary in Tyrone PA.
Rebecca Grazier is 5' 10".
Rebecca Grazier goes by Becca, and Becky.
Colin Grazier died on 1942-10-30.
Margaret Hayes Grazier was born in 1916.
Margaret Hayes Grazier died in 1999.
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Camel is a common noun.
Th word tail is a common noun because the first letter of a proper noun is capitalized.