bondage vs sexual practice

bondage and sexual practice both are nouns.

Word	Noun	Adjective	Verb	Adverb
bondage	Yes	No	No	No
sexual practice	Yes	No	No	No

As nouns, sexual practice is a hypernym of bondage; that is, sexual practice is a word with a broader meaning than bondage:

bondage: sexual practice that involves physically restraining (by cords or handcuffs) one of the partners
sexual practice: activities associated with sexual intercourse

Other hypernyms of bondage include sex, sex activity, sexual activity.

bondage (noun)	sexual practice (noun)
sexual practice that involves physically restraining (by cords or handcuffs) one of the partners	activities associated with sexual intercourse
the state of being under the control of another person
the state of being under the control of a force or influence or abstract power