fluorescein vs solution

fluorescein and solution both are nouns.

Word	Noun	Adjective	Verb	Adverb
fluorescein	Yes	No	No	No
solution	Yes	No	No	No

fluorescein (noun)	solution (noun)
a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)	the successful action of solving a problem
	a method for solving a problem
	a statement that solves a problem or explains how to solve the problem
	the set of values that give a true statement when substituted into an equation
	a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution