understandable vs intelligible

understandable and intelligible both are adjectives.

Word	Noun	Adjective	Verb	Adverb
understandable	No	Yes	No	No
intelligible	No	Yes	No	No

As adjectives, understandable and intelligible are synonyms defined as:

understandable and intelligible: capable of being apprehended or understood

Other synonyms of understandable include apprehensible, graspable, perceivable.

understandable (adjective)	intelligible (adjective)
capable of being apprehended or understood	well articulated or enunciated, and loud enough to be heard distinctly
	capable of being apprehended or understood