Eagre

n.

1.

A wave, or two or three successive waves, of great height and violence, at flood tide moving up an estuary or river; - commonly called the bore. See Bore.

Noun

1.

eagre - a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) Synonyms: aegir, eager, tidal bore, bore

aegir, bore, eager, tidal bore, tidal current, tidal flow