tidy vs sizable

tidy is a noun but sizable is not a noun.

Word	Noun	Adjective	Verb	Adverb
tidy	Yes	Yes	Yes	No
sizable	No	Yes	No	No

As adjectives, tidy and sizable are synonyms defined as:

Other synonyms of tidy include goodish, goodly, healthy, hefty, respectable, sizeable.

tidy (noun)	sizable (noun)
receptacle that holds odds and ends (as sewing materials)

tidy (adjective)	sizable (adjective)
marked by order and cleanliness in appearance or habits	large in amount or extent or degree
large in amount or extent or degree	fairly large in size
(of hair) neat and tidy

tidy (verb)	sizable (verb)
put (things or places) in order