is a specific kind of: contend, fight, struggle.

is a broader term that covers: recalcitrate | fend, resist, stand | hold out, resist, stand firm, withstand | drive back, fight off, rebuff, repel, repulse.

derivation: confrontation, opposition | attack aircraft, fighter, fighter aircraft | fight | adversary, antagonist, opponent, opposer, resister | battler, belligerent, combatant, fighter, scrapper | opponent, opposing | defensive, justificative, justificatory.