index vs publication

index and publication both are nouns.

Word	Noun	Adjective	Verb	Adverb
index	Yes	No	Yes	No
publication	Yes	No	No	No

index (noun)	publication (noun)
the finger next to the thumb	the business of issuing printed matter for sale or distribution
an alphabetical listing of names and topics along with page numbers where they are discussed	the act of issuing printed materials
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time	the communication of something to the public; making information generally known
a mathematical notation indicating the number of times a quantity is multiplied by itself	a copy of a printed work offered for distribution
a numerical scale used to compare variables with one another or with some reference number