hiatus vs abatement

hiatus and abatement both are nouns.

Word	Noun	Adjective	Verb	Adverb
hiatus	Yes	No	No	No
abatement	Yes	No	No	No

As nouns, hiatus and abatement are synonyms defined as:

hiatus and abatement: an interruption in the intensity or amount of something

Other synonyms of hiatus include reprieve, respite, suspension.

hiatus (noun)	abatement (noun)
a natural opening or perforation through a bone or a membranous structure	the act of abating
a missing piece (as a gap in a manuscript)	an interruption in the intensity or amount of something
an interruption in the intensity or amount of something