Attack with a weapon or cast a spell.

Two-Weapon Fighting allows two attacks using a pair of light weapons, using your Bonus Action.

Grapple a foe with a free hand, using your Athletics vs their Athletics or Acrobatics. This counts as an attack.

Dash allows you to move up to your speed, in addition to your Move Action.

Disengage from melee with a foe. Your movement no longer provokes attacks for this turn.

Dodge to focus on defense. Attacks made against you have disadvantage.

Help gives an ally advantage to an ability check or attack.

Hide lets you try to hide from your enemy. You roll a Stealth check vs their Passive Perception. On success you gain advantage to attacking visible foes and they have disadvantage to hit you.

Ready an Action performs a single action later in the round, using your Reaction, once a trigger occurs. Readying an attack does not give the benefit of Extra Attack. When readying any spell you need to concentrate on this spell until it is cast even if the spell itself does not require concentration.

Search devotes your turn to finding something. This may require a Perception or Investigation check.

Shove lets you push a foe back 5 feet or knock them prone using Athletics vs their Athletics or Acrobatics. This counts as an attack.

Use an Object lets you activate or interact with an item that takes an entire action to function.