Yes, "duke" is a common noun when it refers to a noble title or rank in general, rather than a specific person. For example, in the phrase "the duke of a certain region," it is used as a common noun. However, when used as part of a specific title, such as "Duke of Cambridge," it becomes a proper noun.
Some common gender nouns (synonyms) for the noun duke are:aristocratnobilityroyaltyblue blood
duke's
The noun 'duke' is a gender specific noun for a male.The corresponding gender specific noun for a female is duchess.Duchess
The noun lad is a word for a male. The noun marquis is a word for a male. The noun baron is a word for a male. The noun duke is a word for a male. The noun colt is a word for a male horse under age four. The noun giant is a common gender noun as a word for a person. The noun giant is a neuter noun as a word for a thing.
The noun duke is a title for a male; the noun duchess is a title for a female.
The noun duke is a word for a male.
Duke is a proper noun when used as a title for a specific person. For example John Doe, Duke of Anytown, or when referring to that same person later on. It is not used as a proper noun when referring to a group. For example: "The dukes were present at the ball." Unless you are referring to specific people or Duke University, Duke is not a proper noun.
The gender noun duke is a title for a male; the gender noun for a female is duchess.
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.