Letters that make propositional calculus
s, a, o, l, n, p, c, r, t, i, u are letters that make 'propositional calculus'
Words within propositional calculus
cul, calculus, os, OS, IT, posit, ti, si, proposition, PR, PO, sit, Ro, SI, position, on, pro, positional, prop, US, AL, CA, Io, ion, Po, Al, Ca, Cu, Lu, Os, Pr, Si, Na, Ti are words within 'propositional calculus'