✅ A direction is a kind of course to follow, generally with a goal in mind (It took us a while to decide on our direction).

✅ A tack is a course of action or approach (When something doesn’t work, it’s important to change tack).

✅ Both of these words refer to an approach, course, or route, especially in a figurative sense.

✅ You would normally use tack when you’re changing direction (I realized my approach wasn’t working, so I tried a different tack).

✅ Wool refers to the fiber made from the coats of animals such as sheep, goats, and alpacas. It also refers to this fiber when spun or the warm fabric made from this fiber (Pieces of wool stuck to the fence).

✅ Yarn refers to any thread made from natural or synthetic fiber that is used in knitting, crochet, and similar crafts (My cat loves playing with yarn).

✅ Wool can also refer to any fiber that resembles the fiber from animals (vegetable wool; steel wool), whereas yarn typically refers to the length of the fiber and not the material (This project will take several balls of yarn).

✅ Grade means to separate and classify a set of things according to a given scale (We need to grade the diamonds before we use them).

✅ Sort means to organize and classify things, especially to put them into defined groups (I sorted the coffee cups by size).

✅ Sort and grade both mean to classify something.

✅ Sort emphasizes organization, whereas grade emphasizes assigning a value.