intentional vs designed

intentional and designed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
intentional	No	Yes	No	No
designed	No	Yes	No	No

As adjectives, intentional and designed are synonyms defined as:

intentional and designed: done or made or performed with purpose and intent

Other synonyms of intentional include unintentional.

intentional (adjective)	designed (adjective)
done or made or performed with purpose and intent	done or made or performed with purpose and intent
characterized by conscious design or purpose