participle vs participial

participle and participial both are nouns.

Word	Noun	Adjective	Verb	Adverb
participle	Yes	No	No	No
participial	Yes	Yes	No	No

As nouns, participle and participial are synonyms defined as:

participle and participial: a non-finite form of the verb; in English it is used adjectivally and to form compound tenses

participle (noun)	participial (noun)
a non-finite form of the verb; in English it is used adjectivally and to form compound tenses	a non-finite form of the verb; in English it is used adjectivally and to form compound tenses

participle (adjective)	participial (adjective)
	of or relating to or consisting of participles