What's the difference between justle and rivalship?

Justle

Definition:

• (v. i.) To run or strike against each other; to encounter; to clash; to jostle.
• (v. t.) To push; to drive; to force by running against; to jostle.
• (n.) An encounter or shock; a jostle.

Example Sentences:

Rivalship

Definition:

• (n.) Rivalry.

Example Sentences: