Word pairs like love and hate, right and wrong are gradable antonyms:
A gradable antonym is one of a pair of words with opposite meanings where the two meanings lie on a continuous spectrum. Temperature is such a continuous spectrum so hot and cold, two meanings on opposite ends of the spectrum, are gradable antonyms. Other examples include: heavy, light; fat, skinny; dark, light; young, old; early, late; empty, full; dull, interesting.
The words you're looking for are midway along the spectrum between gradable antonyms, so medionym would be a good neologism. However, there's another way of looking at this.
Love (in the sense of passion or ambition) is also the opposite of indifference – just in a different direction from the love–hate spectrum. Likewise for right and ambiguous. The words you're talking about are still antonyms, of a special sort that is opposite to both ends of a spectrum. A good name for this would be orthogonal antonym, to reflect that it is “perpendicular” to gradable antonyms.
Welcome to the site. I believe your question is appropriate here because it is partly about concept-associative vocabulary.
Four words come to mind, but all (in your 40%) without initial "s", and all with initial "c". They are coterie, cabal, camarilla,and clique. Whether these are used in movies or not I cannot say. The meanings are trivial to look up but of the four I like:
cabal =
a small group of people who plan secretly to take action, especially political action
Cambridge dictionary
and
camarilla =
a group of advisers, usually a secret group who are involved in a plot
for example "... an entourage of penniless, ignorant, intriguing ministers watched over by camarillas of officers..."
Macmillan dictionary
Wikipedia has a broader definition of cabal that fits it almost exactly to your specification:
"A cabal is a group of people united in some close design, usually to promote their private views or interests in an ideology, state, or other community, often by intrigue and usually unbeknownst to those outside their group. The use of this term usually carries negative connotations of political purpose, conspiracy and secrecy."
Wikipedia
An illustration of the use of cabal is:
"The common theme in conspiracy theories about a New World Order is that a secretive power elite with a globalist agenda is conspiring to eventually rule the world through an authoritarian world government—which will replace sovereign nation-states—and an all-encompassing propaganda whose ideology hails the establishment of the New World Order as the culmination of history's progress. Many influential historical and contemporary figures have therefore been alleged to be part of a cabal that operates through many front organizations to orchestrate significant political and financial events, ranging from causing systemic crises to pushing through controversial policies, at both national and international levels, as steps in an ongoing plot to achieve world domination"
Wikipedia
It is interesting that these words reflect a Romance language influence (French & Spanish). If we look for similar words in northern Europe (Scandinavian, German, Russian) we often find transliterative versions of cabal and clique.
Best Answer
See my comment for Richard Kayser, above.
In the military, the attempt in Basic Training is to eliminate differences between soldiers among the ranks. Individuality is discouraged, except for the exceptional standout, who ends up in a key unit, such as the Green Berets, Navy SEALs, etc.
Everyone else is, by design, made to look just like the next guy. There are many opinions as to why this is, but the fact is, it is this way. Every man gets the same uniform. The haircuts are the same, even the glasses are identical, except for the prescription.
So, maybe an army term based on size would be suitable, with an adjective preceding it to further describe the collection.
For example, some size words: squad, platoon, brigade, army... "Mr. Smith had a squad of birds. They all looked exactly the same." "Mr. Smith had a platoon of birds. They all looked exactly the same." "Mr. Smith had a brigade of birds. They all looked exactly the same." "Mr. Smith had an army of birds. They all looked exactly the same."
Adjectives to describe the collection: unorganized, disciplined, undisciplined, etc. "Mr. Smith had an unorganized squad of birds. They all looked exactly the same." "Mr. Smith had a disciplined squad of birds. They all looked exactly the same." "Mr. Smith had an undisciplined squad of birds. They all looked exactly the same."