tide vs low tide

tide and low tide both are nouns.

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

As nouns, low tide is a hyponym of tide; that is, low 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
low tide: the lowest (farthest) ebb of the tide

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