Сравнительная степень имеет супплетивную форму «больше» (также возможна аналитическая «более большой»); употребляется и краткая форма (больш, больша, большо, больши).
У неё было большое терпение, чтобы выслушать все жалобы.
She had great patience to listen to all the complaints.
Это было большое событие в жизни города.
It was a major event in the city's life.
older Used about age or relative seniority (e.g., an older brother).
Большой брат всегда заботился о младших.
The older brother always took care of the younger ones.
grown-up Common when talking about a child who is no longer little.
Он уже большой, сам может дойти до школы.
He is already a grown-up and can get to school by himself.
На собрание пришло большое количество людей.
A large number of people came to the meeting.
grand More literary; often suggests impressiveness.
huge Stronger than big/large.
vast Typically about area, extent, or scale.
immense Very large in size or degree; emphatic.
enormous Stronger than big/large; very large.
extensive About scope/coverage rather than physical size.
ample Suggests 'more than enough' (space, time, etc.).
substantial About significant amount/degree; often more formal.
Разговорное употребление: старший ребёнок, старший брат или сестра
eldest Used as a noun for the oldest child in a family.
Большого отправили за хлебом, а младшие остались дома.
The eldest was sent to buy bread, and the younger ones stayed at home.