acrobatics vs tumbling

acrobatics and tumbling both are nouns.

Word	Noun	Adjective	Verb	Adverb
acrobatics	Yes	No	No	No
tumbling	Yes	No	No	No

As nouns, acrobatics and tumbling are synonyms defined as:

acrobatics (noun)	tumbling (noun)
the gymnastic moves of an acrobat	the gymnastic moves of an acrobat
the performance of stunts while in flight in an aircraft