precipitousness vs steepness

precipitousness and steepness both are nouns.

Word	Noun	Adjective	Verb	Adverb
precipitousness	Yes	No	No	No
steepness	Yes	No	No	No

As nouns, precipitousness and steepness are synonyms defined as:

precipitousness and steepness: the property possessed by a slope that is very steep

Other synonyms of precipitousness include abruptness.

precipitousness (noun)	steepness (noun)
the property possessed by a slope that is very steep	the property possessed by a slope that is very steep
the quality of happening with headlong haste or without warning