Below are a few Korean words that may be of interest:

English/Korean Translations
Words Numbers
Taekwondo Facility Do-jahng 1 Hana 20 Soo-mool
Class Gae-in 2 Dul 30 Seo-reun
Degree (Rank) Dan (Dahn) 3 Set 40 Mah-heun
Instructor Sah-beom nim 4 Net 50 Shwee-heun
Trainee Instructor Boo Sah-beom nim 5 Dosot 60 Yea-heun
Uniform Dobok 6 Yosot  70 Ee-reun
Yell Kihap 7 Ilgulp 80 Yeo-deun
Bow Kyungnae 8 Yodul 90 Ah-heun
End Bahroh 9 Ahup 100 Beck
About Face Dweeroh-tohrah 10 Yul     
At Ease Shi-uh 11 Yo-hana    
Ready Jhoonbee 12 Yo-Dul    
Stop Kohmahn 13 Yo-Set    
Position Jah-sae 14 Yo-Net    
Kick Chah-gi 15 Yo-dosot    
Strike Chi-gi 16 Yo-yosot    
Punch Jee-reu-gi 17 Yo-ilgulp    
Begin Chi-jak 18 Yo-yodul    
Attention Charyut 19 Yo-ahup