Yes, but the words: tidle bore, aegir, eagre, or eygre
aegir, eagre, or eygreare not be found in Online Etymology.
... Aegir is the god of the sea in Norse mythology.

eagre:1640–50; apparently representing earlier agar, ager, obscurely akin to hyger, higre; (compare Anglo-Latin (12th century) higra the tidal bore of the Severn); compared with Old English ēgor, eogor flood, high tide, though preservation of g in modern forms is problematic

bore (v.)

O.E. borian "to bore through, perforate," from bor "auger," from P.Gmc. *buron (cf. O.N. bora, Swed. borra, O.H.G. boron, M.Du. boren, Ger. bohren), from PIE base *bher- (2) "to cut with a sharp point" (cf. Gk. pharao "I plow," L. forare "to bore, pierce," O.C.S. barjo "to strike, fight," Albanian brime "hole").