1. buzz
2. hum
3. systolic murmur
4. coo
5. grumble
6. mutter
7. low
8. murmuration
9. murmured
10. murmuring
11. cardiac murmur
12. complaint
13. continuous
14. croak
15. gnarl
16. grumbling
17. heart murmur
18. indistinct
19. murmur vowel
20. muttering
21. rumble
22. susurrate
23. mumble
24. sough
25. susurration
|
26. bruit
27. chide
28. fremescent
29. grucche
30. huzz
31. lip
32. mourn
33. purr
34. remurmur
35. souffle
36. unmurmuring
37. unprotesting
38. babble
39. croon
40. whisper
41. burble
42. chunter
43. moan
44. purl
45. acquiescence
46. burr
47. complain
48. fall
49. groin
50. growl
|
51. grudge
52. low-toned
53. onomatopoeia
54. peevishness
55. pitter
56. purling
57. querulous
58. rale
59. repine
60. resigned
61. rumor
62. susurrus
63. systolic
64. thrill
65. drone
66. grievance
67. whine
68. flat
69. run
70. sweep
71. blur
72. dim
73. base
74. cheap
75. cold
|
76. deep
77. lowly
78. soft
79. trough
80. underestimate
|
