liquid vs instillation

liquid and instillation both are nouns.

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

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

Other hyponyms of liquid include artificial blood, elixir, H2O, water, extravasation, liquid crystal, spill, tuberculin.

liquid (noun)	instillation (noun)
a frictionless continuant that is not a nasal consonant (especially `l' and `r')	the introduction of a liquid (by pouring or injection) drop by drop
the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility	a liquid that is instilled drop by drop
fluid matter having no fixed shape but a fixed volume
a substance that is liquid at room temperature and pressure

liquid (adjective)	instillation (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