water vs liquid

water and liquid both are nouns.

Word	Noun	Adjective	Verb	Adverb
water	Yes	No	Yes	No
liquid	Yes	Yes	No	No

As nouns, liquid is a hypernym of water; that is, liquid is a word with a broader meaning than water:

Other hypernyms of water include food, nutrient, nutrient.

As nouns, liquid is a hypernym of water; that is, liquid is a word with a broader meaning than water:

water: binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
liquid: fluid matter having no fixed shape but a fixed volume

Other hypernyms of water include binary compound.

water (noun)	liquid (noun)
a facility that provides a source of water	a frictionless continuant that is not a nasal consonant (especially `l' and `r')
a liquid necessary for the life of most animals and plants	the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility
the part of the earth's surface covered with water (such as a river or lake or ocean)	fluid matter having no fixed shape but a fixed volume
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent	a substance that is liquid at room temperature and pressure
liquid excretory product
once thought to be one of four elements composing the universe (Empedocles), associated with the humour phlegm

water (adjective)	liquid (adjective)
	existing as or having characteristics of a liquid; especially tending to flow
	changed from a solid to a liquid state
	clear and bright
	in cash or easily convertible to cash
	smooth and unconstrained in movement
	smooth and flowing in quality; entirely free of harshness
	filled or brimming with tears

water (verb)	liquid (verb)
secrete or form water, as tears or saliva
supply with water, as with channels or ditches or streams
fill with tears
provide with water