Q1: obdurate
Commensurate
Obstinate
Castigate
Q2: Taper
Paper
Wraper
Diminish
Q3: Tawdry
Rowdy
Brady
Shoddy
Q4: Palpable
Culpable
Valuable
Perceptible
Q5: Parsimonious
Acrimonious
Lucrid
Stingy
