Mascara is a kind of make-up that you put on your eyelashes to make them darker and thicker.
Masonry is a way of constructing buildings out of any type of heavy block. Different types of masonry include bricks, stone and cinder blocks.
A mat is a piece of fabric, usually made from something quite firm like woven rushes. Mats come in different sizes depending on what they are used for. Doormats are used to wipe your feet on outside a door, placemats are used for protecting a table as you eat, and various sized floor mats are used in indoor sports as a soft surface over a hard floor.
The woman in the picture is on a yoga mat.
A matchbook is a different way to store matches than the more common matchbox. Matchbooks are essentially a folded over piece of cardboard with a rough strip on the outside for striking the matches on. The matches in the matchbook are all attached together in a row, and also attached to the inside of the matchbook. They are also made from cardboard, and must be torn off before they can be used.
A matchbox is a small box designed to hold matches. Matchboxes usually have a rough strip along one or two sides to light the matches with.
When all the matches have run out, matchboxes are handy to keep other small items in.