The phrase "a sense of solidarity" is correct and can be used in written English. You can use it to refer to a feeling of togetherness and cooperation that a group of people have, especially when they are facing a challenge or difficulty. For example, "The volunteers from the local community worked together to distribute food and supplies, demonstrating a strong sense of solidarity."
A sense of solidarity and confidence prevails.
"There's a sense of solidarity: 'We're family.
"It creates a solidity for the system, and a sense of solidarity," Mr. Moscovici said Thursday.
There is less of a sense of solidarity, especially with vulnerable populations".
Second, because of our exile we developed a sense of solidarity.
I had a sense of solidarity for a larger cause and the desire to help others.
Marsha quickly felt a sense of solidarity with the other mothers, but Carl remained mistrustful.
"It's all based out of a sense of solidarity and social justice.
They were filled with excitement, overflowing with a sense of solidarity, as were we.
Promote respectful curiosity and a sense of solidarity among diverse youth.
The construction of these places facilitated a sense of solidarity among the Italian immigrants and expressed their belonging to place.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union