Ranks and titles :

Sensei

Instructor

Shihan

A senior teacher, properly used within the school only, when outside, use Sensei

Kyu

Student grade, from 10 up to 1.

Dan

More advanced grades, from 1 to 10 :
 
Shodan , Nidan , Sandan , Yondan , Godan , Rokudan , Nanadan ,
Hachidan , Kudan , Judan

Yudansha

Members with dan grades

Mudansha

Members with kyu grades

Doshu

Head of the way (currently Moriteru Ueshiba,
grandson of O' Sensei)

O' Sensei

Great Teacher (Ueshiba, Morihei)

  Principles :

Ikkyo

1. principle = oshi taoshi, ude osae

Nikyo

2. principle = kote mawashi, kotemaki

Sankyo

3. principle = kote hineri, shibori-kime

Yonkyo

4. principle = tekubi osae

Gokyo

5. principle = kuji-osae

Rokkyo

6. principle = hiji-kime-osae or waki-katame or ude-hishigi.

Nanakyo

7. principle = Yonkyo applied to back of wrist

Hakyo

8. principle = kote-ori-kakae-kimi, kuji-dori =
    Nikyo in which his elbow is in your armpit and his hand
    is  pulled forward ;  Pinning their hand with your foot

Kukyo

9. principle = Inverted nanakyo

  Techniques :

Ukemi

Lit. "receiving with the body"

Kumitachi

Sword partnership practice

Kumijo

Staff partnership practices

Tachi dori

Sword takeaways

Tanto dori

Knife takeaways

Atemi-waza

Techniques to strike a vital point

Hanmi-handachi waza

One person standing, one person sitting techniques

Kaeshi-waza

Counter techniques

Sutemi waza

a technique accomplished by sacrificing your body

Suwari waza

Techniques executed with both uke and nage in a seated position.

Ushiro-waza

Techniques from rear attacks

Uke-waza

Blocking techniques

  Striking :

Atemi

Strike to a vital point

Shomen uchi

Overhead strike to the head.

Yokomen uchi

Diagonal strike to the side of the head.

Mune tsuki

Thrust toward knot on obi

  Holds :

Katate dori

One hand holding one hand.

Kosadori

hand grab (katatedori ai-hanmi)

Morote dori

Two hands holding one hand.

Kata dori

Shoulder hold

Ryokata dori

Grabbing both shoulders.

Ryote dori

Two hands holding two hands.

Mune dori

One or two hand lapel hold.

Hiji dori

Elbow grab

Sode dori

Sleeve grab

Ushiro eri-dori

Neck grab from the back (usually the collar  )

Ushiro tekubi dori

Wrist grab from the back.

Ushiro ryote dori

Wrist grab from the back. 

Ushiro ryokata dori

Wrist grab from the back. 

Ushiro kubi shime

Rear choke.

  Throws :

Irimi nage

Entering throw ("20 year technique")

Juji nage,
Juji garami

Arm entwining throw  ( " N. 10 throw", since the arms form the japanese sign for 10 "+". arms crossed, elbows locked)

Kaiten nage

Rotary throw. uchi-kaiten nage and soto-kaiten nage (inside and outside)

Kokyu ho

morotetori kokyu nage or ryotemochi kokynage ude-oroshi irimi

Kokyu nage

Breath throw (There are a zillion of these in Aikido. Most of them just variations of the basic techniques)

Koshi nage

Hip throw

Kote gaeshi

Wrist turn-out

Shiho nage

Four direction throw

Tenchi nage

Heaven and earth throw

Kokyu dosa

Breath-power movement (from seiza)