aerobatics vs tailspin

aerobatics and tailspin both are nouns.

Word	Noun	Adjective	Verb	Adverb
aerobatics	Yes	No	No	No
tailspin	Yes	No	No	No

As nouns, tailspin is a hyponym of aerobatics; that is, tailspin is a word with a more specific, narrower meaning than aerobatics:

Other hyponyms of aerobatics include spin.

aerobatics (noun)	tailspin (noun)
the performance of stunts while in flight in an aircraft	rapid descent of an aircraft in a steep spiral
	loss of emotional control often resulting in emotional collapse