conglomeration vs congeries

conglomeration and congeries both are nouns.

Word	Noun	Adjective	Verb	Adverb
conglomeration	Yes	No	No	No
congeries	Yes	No	No	No

As nouns, conglomeration and congeries are synonyms defined as:

conglomeration and congeries: a sum total of many heterogenous things taken together

Other synonyms of conglomeration include aggregate.

conglomeration (noun)	congeries (noun)
an occurrence combining miscellaneous things into a (more or less) rounded mass	a sum total of many heterogenous things taken together
a sum total of many heterogenous things taken together
a rounded spherical form