In this context, 'big' is an equivalent word for 'large'.
alternate term
Frequency:
65
%
An alternate term for 'happy' is 'joyful'.
corresponding term
Frequency:
60
%
Each word has a corresponding term that can be used as a synonym.
matching synonym
Frequency:
45
%
The matching synonym for 'angry' is 'mad'.
Idiomatic Expressions for synonym
Phrase: to say the same thing in other words
Meaning: to express the same idea in a different way
Usage: I think we should postpone the meeting until next week. To say the same thing in other words, let's reschedule.