Whenever I need a crisp, single-word label for someone kicked to the fringes, I reach for 'pariah' first. It’s punchy, has historical weight, and immediately conveys social rejection without sounding clinical. 'Pariah' feels perfect when the exclusion is communal and stigmatizing — like a character in a novel who’s been branded and shunned. 'Outsider' is softer and more neutral, useful when the separation is about cultural fit rather than moral condemnation.
I also like 'misfit' for a sympathetic, humanizing spin; it says oddball rather than sinful. 'Exile' brings a dramatic, sometimes self-imposed distance. In more modern contexts 'outlier' works if you want a quasi-analytical tone — it highlights difference without moral judgment. Some single-word choices carry baggage: 'leper' is historically loaded and hurtful, so I avoid it unless the context demands historical accuracy. In the end I pick based on mood and audience — 'pariah' for sting, 'misfit' for warmth, 'outlier' for cool distance. That mix keeps my labeling sharp but not mean, and that’s how I like it.