planetary vs erratic

planetary and erratic both are adjectives.

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

As adjectives, planetary and erratic are synonyms defined as:

Other synonyms of planetary include wandering.

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