pickle vs difficultness

pickle and difficultness both are nouns.

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

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

pickle: informal terms for a difficult 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 pickle include difficulty.

pickle (noun)	difficultness (noun)
vegetables (especially cucumbers) preserved in brine or vinegar	the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result
informal terms for a difficult situation

pickle (verb)	difficultness (verb)
preserve in a pickling liquid