thorniness vs spininess

thorniness and spininess both are nouns.

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

As nouns, thorniness and spininess are synonyms defined as:

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

Other synonyms of thorniness include bristliness, prickliness.

thorniness (noun)	spininess (noun)
the quality of being covered with prickly thorns or spines	the quality of being covered with prickly thorns or spines
a rough and bitter manner
The property of being full of difficulties, complexities, or controversial points.