rebel

As an adjective unstubborn

is not stubborn.

As a noun rebel is

a confederate soldier.

As nouns the difference between rebel and tyrant

is that rebel is a confederate soldier while tyrant is (historic|ancient greece) a usurper; one who gains power and rules extralegally, distinguished from kings elevated by election or succession.

As an adjective tyrant is

(uncommon) tyrannical, tyrannous; like, characteristic of, or in the manner of a tyrant.

As a verb tyrant is

(obsolete) to act like a tyrant; to be tyrannical.

As nouns the difference between pushback and rebel

is that pushback is the act of repelling (an enemy, etc) while rebel is a confederate soldier.

As nouns the difference between challenge and rebel

is that challenge is a confrontation; a dare while rebel is a person who resists an established authority, often violently.

As verbs the difference between challenge and rebel

is that challenge is to invite someone to take part in a competition while rebel is to resist or become defiant toward an authority.

As nouns the difference between rebel and gangster

is that rebel is a person who resists an established authority, often violently while gangster is a member of a criminal or street gang.

As a verb rebel

is to resist or become defiant toward an authority.

As nouns the difference between rebel and table

is that rebel is a person who resists an established authority, often violently while table is furniture with a top surface to accommodate a variety of uses.

As verbs the difference between rebel and table

is that rebel is to resist or become defiant toward an authority while table is to put on a table.

As nouns the difference between rebel and force

is that rebel is a confederate soldier while force is force.

As nouns the difference between reformist and rebel

is that reformist is one who advocates reform (of an institution) while rebel is a person who resists an established authority, often violently.

As an adjective reformist

is advocating reform of an institution or body.

As a verb rebel is

to resist or become defiant toward an authority.

As nouns the difference between union and rebel

is that union is the act of uniting or joining two or more things into one while rebel is a person who resists an established authority, often violently.

As a verb rebel is

to resist or become defiant toward an authority.

As nouns the difference between yankee and rebel

is that yankee is a native or inhabitant of New England while rebel is a person who resists an established authority, often violently.

As a verb rebel is

to resist or become defiant toward an authority.