onomatopoeical vs onomatopoetic

onomatopoeical and onomatopoetic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
onomatopoeical	No	Yes	No	No
onomatopoetic	No	Yes	No	No

As adjectives, onomatopoeical and onomatopoetic are synonyms defined as:

onomatopoeical and onomatopoetic: (of words) formed in imitation of a natural sound

Other synonyms of onomatopoeical include echoic, imitative, onomatopoeic.

onomatopoeical (adjective)	onomatopoetic (adjective)
(of words) formed in imitation of a natural sound	(of words) formed in imitation of a natural sound
	of or relating to or characterized by onomatopoeia