Like for As, or As if. "The matter is now like it was." "The house looked like it would fall."
Likely for Probably. "He will likely be elected." If likely is thought the better word (and in most cases it is) put it this way: "It is likely that he will be elected," or, "He is likely to be elected."
Line for Kind, or Class. "This line of goods." Leave the word to "salesladies" and "salesgentlemen." "That line of business." Say, that business.
Literally for Figuratively. "The stream was literally alive with fish." "His eloquence literally swept the audience from its feet." It is bad enough to exaggerate, but to affirm the truth of the exaggeration is intolerable.
Loan for Lend. "I loaned him ten dollars." We lend, but the act of lending, or, less literally, the thing lent, is a loan.
Locate. "After many removals the family located at Smithville." Some dictionaries give locate as an intransitive verb having that meaning, but—well, dictionaries are funny.
Lots, or a Lot, for Much, or Many. "Lots of things." "A lot of talk."
Love for Like. "I love to travel." "I love apples." Keep the stronger word for a stronger feeling.
Lunch for Luncheon. But do not use luncheon as a verb.
Mad for Angry. An Americanism of lessening prevalence. It is probable that anger is a kind of madness (insanity), but that is not what the misusers of the word mad mean to affirm.