system vs ethic

system and ethic both are nouns.

Word	Noun	Adjective	Verb	Adverb
system	Yes	No	No	No
ethic	Yes	No	No	No

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

system (noun)	ethic (noun)
instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity	the principles of right and wrong that are accepted by an individual or a social group
an ordered manner; orderliness by virtue of being methodical and well organized	a system of principles governing morality and acceptable conduct
a group of physiologically or anatomically related organs or parts
the living body considered as made up of interdependent components forming a unified whole
a complex of methods or rules governing behavior
a procedure or process for obtaining an objective
an organized structure for arranging or classifying
a group of independent but interrelated elements comprising a unified whole
(physical chemistry) a sample of matter in which substances in different phases are in equilibrium