Your jaw is the lower part of your face that moves when you open your mouth.
e.g. John thought for a moment, stroking his jaw.
Your lips are the two outer parts of the edge of your mouth.
e.g. Amy’s thin red lips stretched into a smile.
Your gums are the areas of firm, pink flesh inside your mouth, which your teeth grow out of.
e.g. The toothbrush gently removes plaque without damaging the gums or causing bleeding.
tooth /tuːθ/ (plural teeth)
Your teeth are the hard white objects in your mouth, which you use for biting and chewing.
e.g. Three teeth needed filled and one had to be pulled.
e.g. It’s important to brush your teeth at least twice a day.
Your tongue is the soft movable part inside your mouth which you use for tasting, eating, and speaking.
e.g. Sarah walked over to the mirror and stuck her tongue out.
e.g. David burned his tongue on some soup yesterday afternoon.