"Where? Or is it When?!" - a GCHQ word association puzzle

Question

Instructions (adapted from The GCHQ Puzzle Book (2016) and the introductory puzzle here on Puzzling Stack Exchange): The words in the following list can be partitioned into equal-sized sets depending on words associated with them; each set has its own word association method. This list is arranged so that these associated words are in alphabetical order. One of these sets is missing a member, so you have to work out where in the list the associated word fits alphabetically, and hence where the word itself should appear in the list. The list should be read from left to right and top to bottom and is only written in columns for convenience. (See the introductory puzzle for a more detailed explanation and an example.)

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The question to answer is:

Where does 'FOOL' fit in the following list?

O'NEIL	UPRISING	IVY	STEWART	WINE	LAWS	ASHLEY
SNOW	SHOWERS	KEPNER	HUNTER	LADY	HEINRICHS	ROSS
LOVE	REVOLUTION	MENDEZ	MORNING	GLASPIE	RYAN	STORY
SKIES	WINCHELL	CRISIS	THESES	BOWLBY	TWILIGHTS	LUDGATE

Answer 1

FOOL would fit

anywhere in the list!

There is only 1 set consisting of all of the 28 words. All words can be completed by adding april in front of it. The biggest hint for this is that with FOOL the total number of words would be 29, so either there has to be one big set or 29 sets with 1 word.

And for completeness:

April O'Neil
April Uprising
April Ivy
April Stewart
April Wine
April Laws
April Ashley
April Snow
April Showers
April Kepner
April Hunter
April Lady
April Heinrichs
April Ross
April Love
April Revolution
April Mendez
April Morning
April Glaspie
April Ryan
April Story
April Skies
April Winchell
April Crisis
April Theses
April Bowlby
April Twilights
April Ludgate
April Fool