modest vs small

modest is not a noun while small is a noun.

Word	Noun	Adjective	Verb	Adverb
modest	No	Yes	No	No
small	Yes	Yes	No	Yes

As adjectives, modest and small are synonyms defined as:

Other synonyms of modest include humble, low, lowly.

As adjectives, modest and small are synonyms defined as:

Other synonyms of modest include minor, pocket-size, pocket-sized, small-scale.

As adjectives, modest and small are synonyms defined as:

modest (noun)	small (noun)
	a garment size for a small person
	the slender part of the back

modest (adjective)	small (adjective)
not offensive to sexual mores in conduct or appearance	limited or below average in number or quantity or magnitude or extent
marked by simplicity; having a humble opinion of yourself	made to seem smaller or less (especially in worth)
humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness	have fine or very small constituent particles
low or inferior in station or quality	low or inferior in station or quality
relatively moderate, limited, or small	relatively moderate, limited, or small
not large but sufficient in size or amount	slight or limited; especially in degree or intensity or scope
free from pomp or affectation	lowercase
	not large but sufficient in size or amount
	(of a voice) faint
	(of children and animals) young, immature

modest (adverb)	small (adverb)
	on a small scale