noun
fealty
FEE-ul-tee/ˈfiːəlti/
Loyalty owed to a person or cause.
The soldiers swear fealty to their ruler before the assembled court.

Etymology
The “faithfulness” expressed by fidelitas took a specific form in homage sworn by a vassal to an overlord. That sworn commitment underlies fealty's sense of allegiance to a ruler, leader, or cause.
In context
then he says let's swear fealty to the Orcs what two options stay in the tower and fight them or swear allegiance to them
More examples
- The candidate pledges fealty to the party's leader.
- Her fealty to the cause remains strong despite their setbacks.
- The king demands an oath of fealty from every noble.
Similar words
- allegiance
- Often emphasizes commitment to a nation, government, or political group.
- loyalty
- Broader and less formal; need not imply a sworn obligation.