system vs structure

system and structure both are nouns.

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

As nouns, structure is a hypernym of system; that is, structure is a word with a broader meaning than system:

system: an organized structure for arranging or classifying
structure: the complex composition of knowledge as elements and their combinations

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

system: a group of independent but interrelated elements comprising a unified whole
structure: the people in a society considered as a system organized by a characteristic pattern of relationships

system (noun)	structure (noun)
instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity	a thing constructed; a complex entity constructed of many parts
an ordered manner; orderliness by virtue of being methodical and well organized	the manner of construction of something and the arrangement of its parts
a group of physiologically or anatomically related organs or parts	a particular complex anatomical part of a living thing and its construction and arrangement
the living body considered as made up of interdependent components forming a unified whole	the complex composition of knowledge as elements and their combinations
a complex of methods or rules governing behavior	the people in a society considered as a system organized by a characteristic pattern of relationships
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

system (verb)	structure (verb)
	give a structure to