comedogenic substance vs comedogen

comedogenic substance and comedogen both are nouns.

Word	Noun	Adjective	Verb	Adverb
comedogenic substance	Yes	No	No	No
comedogen	Yes	No	No	No

As nouns, comedogenic substance and comedogen are synonyms defined as:

comedogenic substance and comedogen: A substance that tends to produce acne, such as by clogging pores on the skin.

Other synonyms of comedogenic substance include comedogenic.

comedogenic substance (noun)	comedogen (noun)
A substance that tends to produce acne, such as by clogging pores on the skin.	A substance that tends to produce acne, such as by clogging pores on the skin.