To match the columns correctly:
A. Portmanteau word - III: A word formed by combining two or more words, like 'brunch' (breakfast + lunch).
B. Philology - I: The study of the historical development of languages over time.
C. Phatic language - II: Used for establishing an atmosphere and communication of feelings rather than ideas.
D. Phantom word - IV: A word that exists due to an error of a scribe, printer, or lexicographer.
Thus, the correct matching is A-III, B-I, C-II, D-IV.