FIMOPSR
Make words with R
Never: plural or third-person -S
FIRM FORM FROM IRIS ISOFORM MIRROR MOOR OPSISFORM ORRIS PISSOIR POOR POORI PRIM PRIMP PRIOR PRISM PROM PROMISOR PROMO PROOF PROP RIFF ROMP ROOF ROOM SPOOR
Pangrams: OPSISFORM
score: 97