following vs tailing

following and tailing both are nouns.

Word	Noun	Adjective	Verb	Adverb
following	Yes	Yes	No	No
tailing	Yes	No	No	No

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

Other hyponyms of following include tracking, trailing, shadowing, stalk, stalking.

following (noun)	tailing (noun)
the act of pursuing in an effort to overtake or capture	the act of following someone secretly
a group of followers or enthusiasts

following (adjective)	tailing (adjective)
going or proceeding or coming after in the same direction
in the desired direction
about to be mentioned or specified
immediately following in time or order