inscrutable vs mystifying

inscrutable and mystifying both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inscrutable	No	Yes	No	No
mystifying	No	Yes	No	No

As adjectives, inscrutable and mystifying are synonyms defined as:

Other synonyms of inscrutable include cryptic, cryptical, deep, mysterious.

inscrutable (adjective)	mystifying (adjective)
of an obscure nature	of an obscure nature