Subcategories:
You can see the full category hierarchy on the Category Map.
| 
 | 
 | 
| 1 beginning with A | ALARM | 
| 5 beginning with B | BAA BAA (2) BANG BANG (2) BELLOW | 
| 3 beginning with C | CATERWAUL CLUCK CRASH | 
| 3 beginning with E | ECHO ECHO (2) ENCOURAGEMENT | 
| 1 beginning with F | FRING | 
| 1 beginning with G | GURGLE | 
| 4 beginning with H | HISS HUM HUSH HUSH (2) | 
| 1 beginning with J | JINGLE | 
| 1 beginning with K | KERPOW | 
| 2 beginning with L | LOUD LOUD (2) | 
| 1 beginning with M | MEOW | 
| 1 beginning with O | ONOMATOPOEIA | 
| 2 beginning with P | PLONK (2) PLURAL | 
| 6 beginning with S | SIREN SIREN (2) SONIC SSH (2) SWISH SWISH (2) | 
| 2 beginning with V | VROOM VROOM (2) | 
| 11 beginning with W | WA WAAAAH! WAAAH! WHINE WHINE (2) WHINE (3) WHINE (4) WHINE (5) WHINE (6) WHINNY WHOOP | 
| 45 apronyms in total | |