ohne mich im Recht so richtig auszukennen: klingen die Funde nicht so, als sei beides korrekt?
Roget’s II: The New Thesaurus, Third Edition. 1995.
NOUN: 1. An assumption of responsibility, as one given by a manufacturer, for the quality, worth, or durability of a product: guarantee, guaranty, warrant, warranty. See OBLIGATION. 2. One who assumes financial responsibility for another: backer, guarantor, guaranty, sponsor, underwriter. Informal : angel. See LAW, SUPPORT. 3. The fact or condition of being without doubt: assurance, assuredness, certainty, certitude, confidence, conviction, positiveness, sureness. See CERTAIN.
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
NOUN: Inflected forms: pl. sur·e·ties
1. The condition of being sure, especially of oneself; self-assurance. 2. Something beyond doubt; a certainty. 3. A pledge or formal promise made to secure against loss, damage, or default; a security. 4. One who has contracted to be responsible for another, especially one who assumes responsibilities or debts in the event of default.
OTHER FORMS: sure·ty·ship —NOUN