tidal current vs eagre

tidal current and eagre both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidal current	Yes	No	No	No
eagre	Yes	No	No	No

As nouns, eagre is a hyponym of tidal current; that is, eagre is a word with a more specific, narrower meaning than tidal current:

tidal current: the water current caused by the tides
eagre: a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)

Other hyponyms of tidal current include aegir, bore, eager, tidal bore.

tidal current (noun)	eagre (noun)
the water current caused by the tides	a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)