obese vs weighty

obese and weighty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
obese	No	Yes	No	No
weighty	No	Yes	No	No

As adjectives, obese and weighty are synonyms defined as:

Other synonyms of obese include corpulent, rotund.

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