underwriter (n.)

• actuary
• annuity
• approver
• assurance
• bond
• bondsman
• cosignatory
• cosigner
• deductible
• endorser
• godfather
• godparent
• guarantee
• guarantor
• guaranty
• insurance
• insurer
• mortgagor
• notary
• party
• policy
• ratifier
• signatory
• sponsor
• subscriber
• surety
• upholder
• warrantor