insoluble vs indissoluble

insoluble and indissoluble both are adjectives.

Word	Noun	Adjective	Verb	Adverb
insoluble	No	Yes	No	No
indissoluble	No	Yes	No	No

As adjectives, insoluble and indissoluble are synonyms defined as:

insoluble and indissoluble: (of a substance) incapable of being dissolved

insoluble (adjective)	indissoluble (adjective)
(of a substance) incapable of being dissolved	(of a substance) incapable of being dissolved
admitting of no solution or explanation	used of decisions and contracts
without hope of solution