1 alto
2 archipelago
3 audio
4 auto
5 bamboo
6 banjo
7 bolo
8 buffalo
9 canto
10 cargo
11 cello
12 combo
13 concerto
14 contralto
15 dildo
16 disco
17 domino
18 dynamo
19 echo
20 embryo
21 folio
22 geo
23 gigolo
24 halo
25 hero
26 kangaroo
27 kilo
28 logo
29 macro
30 mango
31 memo
32 moo
33 mosquito
34 moto
35 motto
36 Negro
37 no
38 oratorio
39 photo
40 piano
41 potato
42 quarto
43 radio
44 radios
45 rhinocero
46 roo
47 silo
48 solo
49 soprano
50 studio
51 taboo
52 tatoo
53 tobacco
54 tomato
55 tornado
56 torpedo
57 valcano
58 veto
59 video
60 zero
61 zoo