Viscount vs. Duke: What's the Difference?

Viscount and Duke Definitions
Viscount
A nobleman ranking below an earl or count and above a baron.
Duke
A nobleman with the highest hereditary rank, especially a man of the highest grade of the peerage in Great Britain.
Viscount
Used as a title for such a nobleman.
Duke
A sovereign prince who rules an independent duchy in some European countries.
Viscount
A member of the peerage, above a baron but below a count or earl.
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Duke
Used as the title for such a nobleman.
Viscount
(entomology) Any of various nymphalid butterflies of the genus Tanaecia. Other butterflies in this genus are called earls and counts.
Duke
Dukes(Slang) The fists
Put up your dukes!.
Viscount
An officer who formerly supplied the place of the count, or earl; the sheriff of the county.
Duke
(Botany) A type of cherry intermediate between a sweet and a sour cherry.
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Viscount
(in various countries) a son or younger brother or a count
Duke
To fight, especially with fists
Duking it out.
Viscount
A British peer who ranks below an earl and above a baron
Duke
The male ruler of a duchy (female equivalent: duchess).
Duke
The sovereign of a small state.
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Duke
A high title of nobility; the male holder of a dukedom.
Duke
A grand duke.
Duke
Any of various nymphalid butterflies of the Asian genera Bassarona and Dophla.
Duke
A fist.
Put up your dukes!
Duke
To hit or beat with the fists.
Duke
To give cash to; to give a tip to.
I duked him twenty dollars.
Duke
A leader; a chief; a prince.
Hannibal, duke of Carthage.
All were dukes once, who were "duces" - captains or leaders of their people.
Duke
In England, one of the highest order of nobility after princes and princesses of the royal blood and the four archbishops of England and Ireland.
Duke
In some European countries, a sovereign prince, without the title of king.
Duke
The fists; as, put up your dukes.
Duke
To play the duke.
Lord Angelo dukes it well in his absence.
Duke
To beat with the fists.
Duke
A British peer of the highest rank
Duke
A nobleman (in various countries) of high rank