The Collaborative International Dictionary
Confeder
Confeder \Con*fed"er\ (k[o^]n*f[e^]d"[~e]r), v. i. [Cf. F.
conf['e]d['e]rer. See Confederate.]
To confederate. [Obs.]
--Sir T. North.
Wiktionary
confeder
vb. (context obsolete English) To confederate.