aegir vs tidal current

aegir and tidal current both are nouns.

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

As nouns, tidal current is a hypernym of aegir; that is, tidal current is a word with a broader meaning than aegir:

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

Other hypernyms of aegir include tidal flow.

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