important vs significant

important and significant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
important	No	Yes	No	No
significant	No	Yes	No	No

As adjectives, important and significant are synonyms defined as:

important (adjective)	significant (adjective)
of great significance or value	important in effect or meaning
of extreme importance; vital to the resolution of a crisis	too closely correlated to be attributed to chance and therefore indicating a systematic relation
important in effect or meaning	of considerable importance, size, or worth
having or suggesting a consciousness of high position	rich in significance or implication
having authority or ascendancy or influence