tidal bore vs tidal flow

tidal bore and tidal flow both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidal bore	Yes	No	No	No
tidal flow	Yes	No	No	No

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

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

Other hypernyms of tidal bore include tidal current.

tidal bore (noun)	tidal flow (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