impossibility vs option

impossibility and option both are nouns.

Word	Noun	Adjective	Verb	Adverb
impossibility	Yes	No	No	No
option	Yes	No	No	No

As nouns, option is a hypernym of impossibility; that is, option is a word with a broader meaning than impossibility:

Other hypernyms of impossibility include alternative, choice.

impossibility (noun)	option (noun)
an alternative that is not available	the act of choosing or selecting
incapability of existing or occurring	one of a number of things from which only one can be chosen
	the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited