robustious vs rumbustious

robustious and rumbustious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
robustious	No	Yes	No	No
rumbustious	No	Yes	No	No

As adjectives, robustious and rumbustious are synonyms defined as:

robustious and rumbustious: noisy and lacking in restraint or discipline

Other synonyms of robustious include boisterous, rambunctious, unruly.

robustious (adjective)	rumbustious (adjective)
noisy and lacking in restraint or discipline	noisy and lacking in restraint or discipline