timorousness vs shyness

timorousness and shyness both are nouns.

Word	Noun	Adjective	Verb	Adverb
timorousness	Yes	No	No	No
shyness	Yes	No	No	No

As nouns, shyness is a hyponym of timorousness; that is, shyness is a word with a more specific, narrower meaning than timorousness:

Other hyponyms of timorousness include cold feet, diffidence, self-distrust, self-doubt.

timorousness (noun)	shyness (noun)
fearfulness in venturing into new and unknown places or activities	a feeling of fear of embarrassment
fear of the unknown or unfamiliar or fear of making decisions