bumbling vs bungling

bumbling and bungling both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bumbling	No	Yes	No	No
bungling	No	Yes	No	No

As adjectives, bumbling and bungling are synonyms defined as:

bumbling and bungling: lacking physical movement skills, especially with the hands

Other synonyms of bumbling include butterfingered, ham-fisted, ham-handed, handless, heavy-handed, left-handed.

bumbling (adjective)	bungling (adjective)
lacking physical movement skills, especially with the hands	lacking physical movement skills, especially with the hands
	showing lack of skill or aptitude