establishment vs pecking order

establishment and pecking order both are nouns.

Word	Noun	Adjective	Verb	Adverb
establishment	Yes	No	No	No
pecking order	Yes	No	No	No

establishment (noun)	pecking order (noun)
the act of forming or establishing something	the organization of people at different ranks in an administrative body
a public or private structure (business or governmental or educational) including buildings and equipment for business or residence
the cognitive process of establishing a valid proof
an organization founded and united for a specific purpose
any large organization
the persons (or committees or departments etc.) who make up a body for the purpose of administering something
(ecology) the process by which a plant or animal becomes established in a new habitat