weighty vs of import

weighty and of import both are adjectives.

Word	Noun	Adjective	Verb	Adverb
weighty	No	Yes	No	No
of import	No	Yes	No	No

weighty (adjective)	of import (adjective)
having relatively great weight; heavy	of great significance or value
excessively fat
weighing heavily on the spirit; causing anxiety or worry
of great gravity or crucial import; requiring serious thought
powerfully persuasive