This is in the spirit of the What is a Word/Phrase™ series started by [JLee] with a special brand of [Phrase™] and [Word™] puzzles.
If a word conforms to a special rule, I call it a Southpaw Word™.
Use the following examples below to find the rule.
And, if you want to analyze, here is a CSV version:
SOUTHPAW WORD™, NOT SOUTHPAW WORD™ FAST, QUICK SCREW, NAIL EVADERS, DEFLATERS SWEET, SOUR TREATS, TRICKS AVERTED, WELCOMED REAR, FRONT CREED, MANTRA @45266, COMMUNITY