combustibleness vs burnability

combustibleness and burnability both are nouns.

Word	Noun	Adjective	Verb	Adverb
combustibleness	Yes	No	No	No
burnability	Yes	No	No	No

As nouns, combustibleness and burnability are synonyms defined as:

combustibleness and burnability: the quality of being capable of igniting and burning

Other synonyms of combustibleness include combustibility.

combustibleness (noun)	burnability (noun)
the quality of being capable of igniting and burning	the quality of being capable of igniting and burning