Covenantor is a 10 letter English word. It's valid Words with friends word worth 19 points.
You can make 541 anagrams from letters in covenantor (acennoortv).
First recorded in 1640-50; covenant + -or2
If, on the other hand, A had won his case B would then have a good cause of action against his covenantor.
Some have supposed this privity to be tenure; some, an interest of the covenantee in the land of the covenantor; and so on.