1. Quack - the sound made by a duck
2. Quadrilateral - a four-sided polygon
3. Quadruped - an animal especially a mammal having four limbs
4. Quaff - swallow hurriedly or greedily or in one draught
5. Quagmire - a soft wet area of low-lying land that sinks underfoot
6. Quaint - attractively old-fashioned
7. Qualified - meeting the proper standards and requirements for a task
8. Qualify - prove capable or fit; meet requirements
9. Qualitative - involving distinguishing attributes
10.Qualm - uneasiness about the fitness of an action
11. Quandary - a situation from which extrication is difficult
12. Quantitative - expressible as an amount that can be measured
13. Quantity - how much there is or how many there are of something
14. Quantum - the smallest discrete quantity of some physical property
15. Quarantine - isolation to prevent the spread of infectious disease
16. Quarrel - an angry dispute
17. Quarry - a surface excavation for extracting stone or slate
18. Quash - put down by force or intimidation
19. Quay - wharf usually built parallel to the shoreline
20. ueasy - feeling nausea
21. Quell - suppress or crush completely
22. Quench - put out, as of fires, flames, or lights
23. Querulous - habitually complaining
24. Query - pose a question
25. Quest - the act of searching for something
26. Queue - form a line or stand in line
27. Quibble - argue over petty things
28. Quiescent - being quiet or still or inactive
29. Quietude - a state of peace and quiet
30. Quintessence - the most typical example or representative of a type
31. Quip - witty remark
32. Quirk - a strange attitude or habit
33. Quirky - strikingly unconventional
34. Quisling - someone who collaborates with an enemy occupying force
35. Quiver - shake with fast, tremulous movements
36. Quixotic - not sensible about practical matters
37. Quizzical - playfully vexing, especially by ridicule
38. Quorum - a gathering of the minimal number of members of a group
39. Quotation - a passage or expression that is cited
40. Quotidian - found in the ordinary course of events
