ploy /ploi/

1. An employment, doings, affair, frolic, escapade, or engagement for amusement
2. A method or procedure used to achieve a particular result
3. A manoeuvre in a game, conversation, etc

• know a man by his company
• know a move or two
• know a thing or two
• know better
• know by sight
• knowe
• knower
• knowers
• knowes
• know-how
• knowhow
• know how many beans make five
• know-hows
• knowing
• knowing card
• knowingly
• knowingness
• knowingnesses
• knowing to
• know inside out
• knowledgabilities
• knowledgability
• knowledgable
• knowledgably
• knowledge