erratic vs planetary

erratic and planetary both are adjectives.

Word	Noun	Adjective	Verb	Adverb
erratic	No	Yes	No	No
planetary	No	Yes	No	No

As adjectives, erratic and planetary are synonyms defined as:

Other synonyms of erratic include wandering.

erratic (adjective)	planetary (adjective)
liable to sudden unpredictable change	of or relating to or resembling the physical or orbital characteristics of a planet or the planets
likely to perform unpredictably	of or relating to or characteristic of the planet Earth or its inhabitants
having no fixed course	involving the entire earth; not limited or provincial in scope
	having no fixed course