| Knock on | 8 |
| Knock on the head | 17 |
| Knock on the head result, in movies | 35 |
| Knock on the head result, in soaps | 34 |
| Knock on the noggin | 19 |
| Knock on the noodle | 19 |
| Knock on wood | 13 |
| Knock on wood, say | 18 |
| Knock on ___ | 12 |
| Knock on, as a door | 19 |
| Knock on, as the door | 21 |
| Knock one out of the park | 25 |
| Knock one's knuckles against | 32 |
| Knock one's socks off | 25 |
| Knock opener? | 13 |
| Knock or brat ender | 19 |
| Knock or social attachment | 26 |
| Knock or social preceder | 24 |
| Knock out | 9 |
| Knock out a pier-dwelling mallard? | 34 |
| Knock out of a tournament | 25 |
| Knock out of commission | 23 |
| Knock out of contention | 23 |
| Knock out of kilter | 19 |
| Knock out of shape | 18 |
| Knock out of the park | 21 |
| Knock out of the sky | 20 |
| Knock out some stamps? | 22 |
| Knock out Superman? | 19 |
| Knock out, as with a remote | 27 |
| Knock out, in a way | 19 |
| Knock out, possibly | 19 |
| Knock out, say | 14 |
| Knock out, so to speak | 22 |
| Knock over | 10 |
| Knock over a joint | 18 |
| Knock over cars, perhaps | 24 |
| Knock over, in the worst way | 28 |
| Knock over, so to speak | 23 |
| Knock senseless | 15 |
| Knock sharply | 13 |
| Knock silly | 11 |
| Knock softly on | 15 |
| Knock the socks off | 19 |
| Knock the socks off of | 22 |
| Knock their socks off, colloquially | 35 |
| Knock to the canvas | 19 |
| Knock to the ground | 19 |
| Knock verbally | 14 |
| Knock __ loop | 13 |
| Knock ___ cocked hat | 20 |
| Knock, as on wood | 17 |
| Knock, in the 'hood | 23 |
| Knock, knock! | 13 |
| Knock, slangily | 15 |
| Knock, with "at" | 26 |
| Knock- -- | 9 |
| Knock-down drag-out | 19 |
| Knock-down partner | 18 |
| Knock-down partner? | 19 |
| Knock-down, drag-out affairs | 28 |
| Knock-down, drag-out fight | 26 |
| Knock-down-drag-out | 19 |
| Knock-down-drag-out affairs | 27 |
| Knock-down-drag-out fight | 25 |
| Knock-down-drag-out fights | 26 |
| Knock-down-drag-outs | 20 |
| Knock-knock joke basis | 22 |
| Knock-knock joke payoff | 23 |
| Knock-knock joke punchline, usually | 35 |
| Knock-knock joke's punch line, usually | 42 |
| Knock-knock joke, e.g. | 22 |
| Knock-knock joke, essentially | 29 |
| Knock-knock joke, usually | 25 |
| Knock-knock question | 20 |
| Knock-knock sound | 17 |
| Knock-knock, for one | 20 |
| Knock-loop link | 15 |
| Knock-off board game suffix found after "Dino," "Dog," or "Ocean" | 95 |
| Knock-on-door sounds | 20 |
| Knock-on-the-noggin consequence | 31 |
| Knock-out gas, once | 19 |
| Knock-__ | 8 |
| Knock-___ (opposite of bow-legged) | 34 |
| Knockabout | 10 |
| Knockabout comedy | 17 |
| Knockabout, e.g. | 16 |
| Knockabouts | 11 |
| Knockdown drag-outs | 19 |
| Knockdown follower | 18 |
| Knockdown pitch, in baseball jargon | 35 |
| Knockdown, drag-out's opposite | 34 |
| Knocked | 7 |
| Knocked 'em dead | 20 |
| Knocked about | 13 |
| Knocked around | 14 |
| Knocked at gently | 17 |
| Knocked back a few | 18 |
| Knocked cold | 12 |
| Knocked completely off one's feet | 37 |