challenge

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 verbs the difference between challenge and agree

is that challenge is while agree is .

As verbs the difference between challenge and amend

is that challenge is while amend is to make better.

As verbs the difference between trouble and challenge

is that trouble is while challenge is .

As verbs the difference between testing and challenge

is that testing is present participle of lang=en while challenge is to invite someone to take part in a competition.

As nouns the difference between testing and challenge

is that testing is the act of conducting a test; trialing, proving while challenge is a confrontation; a dare.

As an adjective testing

is difficult, tough.

In obsolete terms the difference between challenge and rival

is that challenge is to censure; to blame while rival is one having a common right or privilege with another; a partner.

As nouns the difference between challenge and rival

is that challenge is a confrontation; a dare while rival is a competitor (person, team, company, etc.) with the same goal as another, or striving to attain the same thing. Defeating a rival may be a primary or necessary goal of a competitor.

As verbs the difference between challenge and rival

is that challenge is to invite someone to take part in a competition while rival is to oppose or compete with.

As an adjective rival is

having the same pretensions or claims; standing in competition for superiority.

As verbs the difference between challenge and disadvantages

is that challenge is while disadvantages is (disadvantage).

As a noun disadvantages is

.

As verbs the difference between challenge and intimidate

is that challenge is to invite someone to take part in a competition while intimidate is to make timid or fearful; to inspire or affect with fear; to deter, as by threats; to dishearten; to abash.

As a noun challenge

is a confrontation; a dare.

As a verb challenge

is .

As an adjective undefined is

lacking a definition or value.

As nouns the difference between challenge and objective

is that challenge is a confrontation; a dare while objective is a material object that physically exists.

As a verb challenge

is to invite someone to take part in a competition.

As an adjective objective is

of or relating to a material object, actual existence or reality.