agreement vs arrangement

agreement and arrangement both are nouns.

Word	Noun	Adjective	Verb	Adverb
agreement	Yes	No	No	No
arrangement	Yes	No	No	No

As nouns, agreement and arrangement are synonyms defined as:

agreement (noun)	arrangement (noun)
compatibility of observations	the act of arranging and adapting a piece of music
the thing arranged or agreed to	the spatial property of the way in which something is placed
the verbal act of agreeing	an organized structure for arranging or classifying
the statement (oral or written) of an exchange of promises	the thing arranged or agreed to
the determination of grammatical inflection on the basis of word relations	a piece of music that has been adapted for performance by a particular set of voices or instruments
harmony of people's opinions or actions or characters	an orderly grouping (of things or persons) considered as a unit; the result of arranging