retral vs backward

retral and backward both are adjectives.

Word	Noun	Adjective	Verb	Adverb
retral	No	Yes	No	No
backward	No	Yes	No	Yes

retral (adjective)	backward (adjective)
moving or directed or tending in a backward direction or contrary to a previous direction	directed or facing toward the back or rear
at or near or toward the posterior	(used of temperament or behavior) marked by a retiring nature
	retarded in intellectual development
	having made less than normal progress

retral (adverb)	backward (adverb)
	in a manner or order or direction the reverse of normal
	in or to or toward a past time
	at or to or toward the back or rear