preposterous vs nonsensical

preposterous and nonsensical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
preposterous	No	Yes	No	No
nonsensical	No	Yes	No	No

As adjectives, preposterous and nonsensical are synonyms defined as:

Other synonyms of preposterous include absurd, cockeyed, derisory, idiotic, laughable, ludicrous, ridiculous.

preposterous (adjective)	nonsensical (adjective)
so unreasonable as to invite derision	so unreasonable as to invite derision
	having no intelligible meaning