Knead (with a silent k) is what you do to dough: press, fold and work it. Need means to require something. Memory hook: you knead with your knuckles, and the k is there to remind you.
The core difference
Knead is a verb for working soft material with the hands, while need means to require or be obliged to do something.
- knead — to press and fold dough until smooth: She kneaded the dough for ten minutes.
- need — to require something, or a requirement itself: Plants need sunlight and water to grow.
How to tell them apart
The two words sound identical, but only knead has a silent k. Picture a baker working dough with knuckles and hands: k for knead, k for knuckles. If the sentence is about bread, pastry or a massage, you want knead.
The mix-up usually appears in recipes and cooking blogs, where need slips in by ear. Check the meaning: if you could swap in require, use need. Cats also knead blankets, pushing with their paws.