It is often difficult to figure out whether words we’ve borrowed from Greek and Latin are singular or plural.
Here is a list of a few such words:
- Outside technical and scientific contexts, data can be used as either a singular or plural noun.
- For forum, podium, and curriculum, it is better to turn them into plural words by adding an “s”; usage shows that forums, podiums, and curriculums are much more popular than their more “sophisticated” counterparts.
- We left out medium on purpose, because it can refer to so many different things: agency of action, method, psychic, compromise, etc. Consult a dictionary for clarification. (Both mediums and media can be its plural form.)
- The SAT actually tests these words (excluding forum, podium, and curriculum and their plurals), so it pays to learn this now.