The son of my father and mother, that it is not me.
Brother
Egg
Taxi/Cab
Dress
It is someone that cures people, prescribing medicine and surgeries.
Doctor
The mother of my mother
Grandmother/Grandma
Lettuce
Bus
T-shirt
It is someone that helps people when they are in danger like fire or flood warning
Firefighter / Fireman
The son of my sister.
Nephew
Cookies/Biscuits
Subway / Underground / Tube
Cap
It is a woman that serves you in a restaurant or a food center.
Waitress.
My father's wife's daughter, but she isn't my sister.
Stepsister
Chips/Fries
Socks
It is someone that makes experiments to get more knowledge.
Scientist.
It is my partner but we are not married yet.
Fiancé
Sausage
Pram / Stroller
Sneakers / trainers
It is some that use chemistry to help people making medicines or new products (makeup, food, drinks, etc).
Chemist