Pledge

16 clues
Oath
Pawn
Swear
Promise
Hostage
Security
Warranty
Guarantee
Assurance
___ word?
Take an oath
Polish brand
Solemn promise
Binding promise
Sorority hopeful
Classroom recitation
Similar answers:
Aaroncabotlodge
Aaronjudge
Aasinapple
Abadge
Abitsimple
Abridge
Abridged
Abridgeddiction
Abridgedversion
Abridger
Abridgers
Abridges
Abridgetoof
Abridgetoofair
Abridgetoofar
Abyssinianpeople
Accordionpleats
Acknowledge
Acompletefool
Acouple