• Basic forms
• 果たす — to accomplish; to fulfill / base
• 果たします — accomplishes / masu form
• 果たした — accomplished / ta form
• 果たして — accomplish and … / te form
• 果たさない — do not accomplish / negative
• 果たせば — if (you) accomplish / conditional
• Common uses
• 役割を果たす — fulfill a role
• 約束を果たす — keep a promise

果たす（はたす） is a godan verb. It means to **actively fulfill or accomplish** a duty, role, or promise.

• Basic forms
• 果てる — to end; to come to an end / base
• 果てます — ends / masu form
• 果てた — ended / ta form
• 果てて — ending and … / te form
• 果てない — never ends / negative
• 果てれば — if it ends / conditional
• Common uses
• 命が果てる — life comes to an end
• 旅が果てた — the journey ended

果てる（はてる） is an ichidan verb. It describes something **ending naturally**, without direct action.