Ranking:
5th Grade - Gokyu
4th Grade - Yonkyu
3rd Grade - Sankyu
2nd Grade - Nikyu
1st Grade - Ikkyu
!st Degree - Shodan
2nd Degree - Nidan
3rd Degree - Sandan
4th Degree - Yondan
5th Degree - Godan
6th Degree - Rokudan
7th Degree - Shichidan
8th Degree - Hachidan
9th Degree - Kudan

10th Degree - Judan

Renshi-Certified Instructor usually 5th or 6th Dan

Kyoshi-Mid-level Certified Instructor usually 6th or 7th Dan

Hanshi- Master Certified Instructor usually 8th thru 10th Dan

Soke -Leader of Organization or Style usually title past down from parent to children. 

Counting:
Ichi - One
Ni - Two
San - Three
Shi - four
Go - Five
Roku - Six
Shichi - Seven
Hachi - Eight
Kyu - Nine
Ju - Ten

Dojo:
Kensen -Sword line, sword direction
Kirikaze - whistling of the sword
Kiru - to cut
Ukeru - block
Furi - to swing (usually an overhead cut)
Oshiri - butt
Atama - head
Ashi - foot
te uchi - grip
Mei - eyes (look at the enemy)
Mune - back (straighten out the back)
Dame - bad, don't do, not good, etc.
ikan - same as above
waza - technique
Mochikata - way of gripping (holding the sword)
Koshi - hip, waist
Tsuki - to stab
Owari - to end
Matte - stop
Rei - to bow
Arigato Gozaimashita - thank you
Gomen nasai - excuse me
Sumimasen - I am sorry (excuse me)

Kohai - Jurior Student with less experience

Sempai - Senior Student with more exerience

Sensei - Teacher

Mudansha - below black belt level

Yudansha - Black belt level

Cuts:
Jodan - High cut
Chudan - Mid cut
Gedan - Low cut