cruelty vs inhuman treatment

cruelty and inhuman treatment both are nouns.

Word	Noun	Adjective	Verb	Adverb
cruelty	Yes	No	No	No
inhuman treatment	Yes	No	No	No

As nouns, cruelty and inhuman treatment are synonyms defined as:

cruelty and inhuman treatment: a cruel act; a deliberate infliction of pain and suffering

cruelty (noun)	inhuman treatment (noun)
a cruel act; a deliberate infliction of pain and suffering	a cruel act; a deliberate infliction of pain and suffering
the quality of being cruel and causing tension or annoyance
feelings of extreme heartlessness