thorniness vs acrimony

thorniness and acrimony both are nouns.

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

As nouns, thorniness and acrimony are synonyms defined as:

Other synonyms of thorniness include acerbity, bitterness, jaundice, tartness.

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