Transform, Heal, Move and Wounded are four actions which we can also call the keywords.
Transform is the unique ability which can completely change the the view and stats of the card. There is a legendary item
Heal – this ability like a Drain fills your health but you heal yourself without attacking. For Control mage there is a Prophecy card
Move is a very interesting ability. This word has some cards with Agility Attribute. You can move your creature to another line to do good trades or to hide it in the shadow line.
Wounded – it means creatures with not full health. Some cards can destroy wounded creatures. So this word can be used in Control and Midrange decks. In Arena you can pick elements of combo (deal damage and destroy a wounded enemy).