That and which are relative pronouns that function similarly within a modifying clause, but are used differently within sentences.
Principal and principle are commonly confused words that are pronounced and spelled similarly but carry different meanings.
Concave and convex are opposite terms used to describe the shapes of mirrors, lenses, graphs, or slopes.
While to and too look and sound similar, they are separate words with different uses in English grammar.
The word capitol is a noun primary used for names of government buildings in state capitals and, more specifically, in Capitol Hill, Washington D.C.
The debate between over among vs. amongst has existed within the English language for centuries, starting from Old and Middle English to present.
Lay and lie are both irregular verbs that describe different actions. Lay fits when an object is set down in place, while lie is used when something is flat.
Adviser and advisor are spelled differently, but they are variants of the same word.
Learn the difference between "who's" and "whose," and see examples of how to use them in a sentence.