springtide vs high tide

springtide and high tide both are nouns.

Word	Noun	Adjective	Verb	Adverb
springtide	Yes	No	No	No
high tide	Yes	No	No	No

As nouns, high tide is a hypernym of springtide; that is, high tide is a word with a broader meaning than springtide:

springtide: a greater than average tide occurring during the new and full moons
high tide: the tide when the water is highest

Other hypernyms of springtide include high water, highwater.

springtide (noun)	high tide (noun)
a greater than average tide occurring during the new and full moons	the tide when the water is highest
a swelling rush of anything