concoction vs excogitation

concoction and excogitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
concoction	Yes	No	No	No
excogitation	Yes	No	No	No

As nouns, excogitation is a hypernym of concoction; that is, excogitation is a word with a broader meaning than concoction:

Other hypernyms of concoction include conception, design, innovation, invention.

concoction (noun)	excogitation (noun)
the act of creating something (a medicine or drink or soup etc.) by compounding or mixing a variety of components	thinking something out with care in order to achieve complete understanding of it
the invention of a scheme or story to suit some purpose	the creation of something in the mind
an occurrence of an unusual mixture
any foodstuff made by combining different ingredients