Aikido Terminology

Basics

Suwate - sit
Tate - stand
Re - bow
Migi - right
Hideri - left

Kamae (Posture)

Seiza - Formal sitting posture.
Kiza - Sitting on Toes.
Hanza - Sitting on one knee.
Hanmi - normal aikido posture.
Ai Hanmi - tori and uke face each other with the same foot forward.
Gyaku Hanmi - tori and uke face each other with the opposite feet forward.

Tai Sabaki (Body Movement)

Irimi - Step forward (enter)
Tsugi Ashi - sliding step
Okiri Ashi - sliding step
Tenkan - turn on front foot and step back
ushiro tenkan - step back with front foot
irimi tenkan - step forward and tenkan.

Dori (grips)

katatedori - uke takes tori's left/right hand with their right/left hand.
Kosadori - uke takes tori's left/right hand with their left/right hand.
Katadori - shouldergrip
Morotedori - two hands grip one hand
Ryotemochi ryotedori - two hand grip two hands
Munedori - grip the front of suit lapels
Hijidori - elbow grip
Sodedori - sleeve grip
Ushiro eri dori - grip back of suit from behind
Ushiro ryokatatedori - two hands grip two hand from behind

Attacks

Shomenuchi - strike to the top of the head
Yokomenuchi - strike to the side of the head
Tsuki - punch
Geri - kick
Ushiro munedakijime - bearhug from behind
Ushiro katatedori kubijime - attack from behind with one arm strangling and the other pinning the wrist

Different versions of technique (waza)

Suwariwaza - sitting techniques
Tachiwaza - standing techniques
Hanmi Handachiwaza - tori sits and uke stands
Nage waza - throwing techniques
Osae waza - pinning techniques
Omote - entering
Ura - turning or going behind
Jodan - upper level
Chudan - middle level
Gedan - lower level

Techniques:

Ikkyo - 1st pinning technique
Nikkyo - 2nd pinning technique
Sankyo - 3rd pinning technique
Yonkyo - 4th pinning technique
Gokyo - 5th pinning technique
Rokkyo (Ude Hishige) - 6th pinning technique
Shihonage - four directional throw
Iriminage - entering throw
Tenchinage - heaven and earth throw
Kokyunage - breath throw
Kotegaishi - outer wrist twist
Kaitenage - turning throw
Sumiotoshi - corner drop
Koshinage - hip throw

There are others aswell but this is enough to be going on with.