different between attorn vs attornment

English

From Middle English attournen, from Old French atorner (“designate”), from a- (“to”) + torner (“turn”).

attorn (third-person singular simple present attorns, present participle attorning, simple past and past participle attorned)

(intransitive, law) To transfer one's obligations from a person to another person.
(intransitive, law) To consent to the transfer of one's obligations as tenant under a lease to a new landlord.
(intransitive, law) To acknowledge the jurisdiction of (a particular court) over one's dispute.

From Old French atorner (“to turn”), through Middle English with the suffix -ment.

attornment (plural attornments)

(feudal law) The consent of a tenant to the transfer of his relationship to his landlord to another person.

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