Possible Duplicate: Why is it “geometric” but “theoretical”? “Electric” vs. “electrical” I think I'm clear on the difference between word ...
I just came across a course name: Geometric and Theoretical Optics. The mismatched endings bug me. Why do we have both -ical and -ic endings? Is there any difference in meaning between, say, ...
There are many suffixes that are used to create adjectives from nouns (-al, -ic, -ive, -y). Are there any rules used to create adjectives from nouns? In example, why is the adjective excessive, and ...