bristliness vs spininess

bristliness and spininess both are nouns.

Word	Noun	Adjective	Verb	Adverb
bristliness	Yes	No	No	No
spininess	Yes	No	No	No

As nouns, bristliness and spininess are synonyms defined as:

bristliness and spininess: the quality of being covered with prickly thorns or spines

Other synonyms of bristliness include prickliness, thorniness.

bristliness (noun)	spininess (noun)
the quality of being covered with prickly thorns or spines	the quality of being covered with prickly thorns or spines