AIPRSTU
Make words with U
Never: plural or third-person -S suffix
APPARATUS AURA AURIST AUTIST PAPPUS PRURITUS PUPA PUPU PURIST PURR PURSUIT PUSS PUTT RUST SPIRITUS SPUR SPURT SPUTA STARTUP STATUS STIRRUP STRATUS STRUT SUIT SUPRA SURPASS SURRA SUSS SUSURRUS TARSUS TAUT TITTUP TRUSS TRUST TUATARA TURISTA TUTU UPSTAIRS UPSTART USURP