As adjectives the difference between higher and extratidal
is that higher is (high) while extratidal is higher or lower than would be caused by tidal effects.
As an adverb higher
is .
As a noun higher
is a national school-leaving examination and university entrance qualification.
higher
English
Adjective
(head)
(high)
Adverb
(head)
Noun
(
en noun)
A national school-leaving examination and university entrance qualification.
Statistics
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extratidal
English
Adjective
(-)
higher or lower than would be caused by tidal effects