Webster’s Revised Unabridged Dictionary · 1913
Practise
Prac′tise (·tĭs), v. t. & i. See Practice.
☞ The analogy of the English language requires that the noun and verb which are pronounced alike should agree in spelling. Thus we have notice (n. & v.), noticed, noticing, noticer; poultice (n. & v.); apprentice (n. & v.); office (n. & v.), officer (n.); lattice (n.), latticed (a.); benefice (n.), beneficed (a.), etc. Cf. sacrifice (-fīz; n. & v.), surmise (?; n. & v.), promise (?; n. & v.); compromise (-mīz; n. & v.), etc. Contrast advice (-vīs′; n.), and advise; device, and devise, etc.