pyrochemistry vs pyrochemical process

pyrochemistry and pyrochemical process both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyrochemistry	Yes	No	No	No
pyrochemical process	Yes	No	No	No

As nouns, pyrochemistry and pyrochemical process are synonyms defined as:

pyrochemistry and pyrochemical process: processes for chemical reactions at high temperatures

pyrochemistry (noun)	pyrochemical process (noun)
processes for chemical reactions at high temperatures	processes for chemical reactions at high temperatures