ideation vs thought process

ideation and thought process both are nouns.

Word	Noun	Adjective	Verb	Adverb
ideation	Yes	No	No	No
thought process	Yes	No	No	No

As nouns, thought process is a hypernym of ideation; that is, thought process is a word with a broader meaning than ideation:

ideation: the process of forming and relating ideas
thought process: the process of using your mind to consider something carefully

Other hypernyms of ideation include cerebration, intellection, mentation, thinking, thought.

ideation (noun)	thought process (noun)
the process of forming and relating ideas	the process of using your mind to consider something carefully