timid vs backward

timid is a noun but backward is not a noun.

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

timid (noun)	backward (noun)
people who are fearful and cautious

timid (adjective)	backward (adjective)
showing fear and lack of confidence	directed or facing toward the back or rear
lacking self-confidence	(used of temperament or behavior) marked by a retiring nature
lacking conviction or boldness or courage	retarded in intellectual development
	having made less than normal progress

timid (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