| keep (noun) form plural: keeps wages; living; stronghold | keep (verb) forms: kept; kept; keeping to hold onto; to save; to store; to watch over; to care for |
| key (adjective) important; significant; fundamental; necessary; crucial | key (noun) form plural: keys device used to open locks; button on a board |
| key (verb) forms: keyed; keyed; keying to fit; to adapt; to adjust; to tune; to supply with an explanatory device | kind (adjective) gentle; good-hearted; understanding; compassionate |
| kind (noun) form plural: kinds type; sort; class; group of things which are classed together because of their similarities | kindly (adjective) nicely; thoughtfully; graciously; considerately; sympathetically |
| kit (noun) form plural: kits set; equipment; outfit; clothing; wash basin | kit (verb) forms: kitted; kitted; kitting to equip; to outfit with supplies |
| know (verb) forms: knew; known; knowing to be acquainted with; to understand; to distinguish; to be aware of | knowledge (noun) form: no plural familiarity; understanding; wisdom; education; awareness |