occasional vs episodic

occasional and episodic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
occasional	No	Yes	No	No
episodic	No	Yes	No	No

As adjectives, occasional and episodic are synonyms defined as:

occasional and episodic: occurring or appearing at usually irregular intervals

occasional (adjective)	episodic (adjective)
occurring from time to time	of writing or narration; divided into or composed of episodes
occurring on a temporary or irregular basis	limited in duration to a single episode
recurring or reappearing from time to time	occurring or appearing at usually irregular intervals
occurring or appearing at usually irregular intervals