faction
FAK-shunnounMeaning a small group within a larger one, often at odds with the rest
Memory hook FACTION: a group that splits OFF. At the bake-sale meeting, two kids march to their own corner, insisting on cookies while everyone else wants cupcakes; they are a faction.
The chess club split into two factions: those who wanted a tournament and those who wanted pizza nights.
In context Within the town council, a small faction refused to approve the budget, and its stubbornness delayed the new bridge by a whole year.
Similar group, camp, bloc, splinter group
From Latin factio, “a group acting together,” from facere (to do).