Which Word When - The First in a Series

affect and effect “Affect” is almost always a verb meaning to influence or to cause a change in. Brünnhilde was affected by the theater's no-horned-helmet policy. “Effect” is usually a noun meaning an outcome or a result. Her explanation that her helmet was merely a part of her dress ensemble had no visible effect on the usher. Sometimes, however, “effect” is a verb meaning to make happen. Thereafter, she fought to effect a change in dress code. discrete and discreet   “Discrete” means "individually separate and distinct." The company had a dozen discrete practices. Those of you active in online dating of one sort or another probably know that “discreet” means "marked by prudence or modesty and wise self-restraint." He was shocked – shocked! – to come across his neighbor’s profile indicating she was in search of a discreet relationship.    then and than   Use “then” when one thing follows or results from another.   Romeo to Friar Laurence: Then plainly know my heart’s dear love is set On the fair daughter of rich Capulet: As mine on hers, so hers is set on mine.   Use “than” when comparing and contrasting.   As the prince says at the conclusion of “Romeo and Juliet”: For never was a story of more woe Than this of Juliet and her Romeo.