Allegiance
Part of speech: noun
Definition: Loyalty to some cause, nation or ruler.
Example sentence: Our country is not the only thing to which we owe our allegiance. It is also owed to justice and to humanity.
Fealty
Part of speech: noun
Definition: Fidelity to one's lord; the feudal obligation by which the tenant or vassal was bound to be faithful to his lord; fidelity; allegiance; faithfulness.The oath by which this obligation was assumed.