rattrap vs difficultness

rattrap and difficultness both are nouns.

Word	Noun	Adjective	Verb	Adverb
rattrap	Yes	No	No	No
difficultness	Yes	No	No	No

As nouns, difficultness is a hypernym of rattrap; that is, difficultness is a word with a broader meaning than rattrap:

rattrap: a difficult entangling situation
difficultness: the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result

Other hypernyms of rattrap include difficulty.

rattrap (noun)	difficultness (noun)
a trap for catching rats	the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result
filthy run-down dilapidated housing
a difficult entangling situation