tide vs high tide

tide and high tide both are nouns.

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

As nouns, high tide is a hyponym of tide; that is, high tide is a word with a more specific, narrower meaning than tide:

tide: the periodic rise and fall of the sea level under the gravitational pull of the moon
high tide: the tide when the water is highest

tide (noun)	high tide (noun)
the periodic rise and fall of the sea level under the gravitational pull of the moon	the tide when the water is highest
something that may increase or decrease (like the tides of the sea)
there are usually two high and two low tides each day