indissoluble vs insoluble

indissoluble and insoluble both are adjectives.

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

As adjectives, indissoluble and insoluble are synonyms defined as:

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

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