Aggressive. As a bonus action, the orc can move up to its speed toward a hostile creature that it can see.

Heavy Two-Weapon Fighting

When you take the Attack action and attack with a heavy melee weapon that you're holding in one hand, you can use a bonus action to attack with a different Heavy melee weapon that you're holding in the other hand. You don't add your ability modifier to the damage of the bonus attack, unless that modifier is negative.

If either weapon has the thrown property, you can throw the weapon, instead of making a melee attack with it.

Dual Wielder

Multiattack. The orc makes two attacks with its Warhammer or its spear.

Greataxe. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (2d12 + 4) slashing damage.

Javelin. Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 9 (3d6 + 3) piercing damage.

Parry: this creature uses it's reaction to add +6 to its AC for that attack.