abruptness vs gruffness

abruptness and gruffness both are nouns.

Word	Noun	Adjective	Verb	Adverb
abruptness	Yes	No	No	No
gruffness	Yes	No	No	No

As nouns, abruptness and gruffness are synonyms defined as:

Other synonyms of abruptness include brusqueness, curtness, shortness.

abruptness (noun)	gruffness (noun)
the quality of happening with headlong haste or without warning	a throaty harshness
the property possessed by a slope that is very steep	an abrupt discourteous manner
an abrupt discourteous manner