This is a subjective appraisal of the state of a group. In other words, it would be one person's belief about how the members of a group feel about a certain issue.
To say that a group shows substantial unity is to say that most of its members are in general agreement with a certain proposal or position.
more substantial, most substantial
You don't need a substantial answer to this question.
substantial
I was hoping for a substantial answer.
There was a substantial rise in our profit this year. This will be a substantial addition to your collection. Everyone thought the ship was substantial, but it later sank in a storm.
substantial
98 pecent is a substantial amount
For Unity/Oneness
Large
The address of the Unity Historical Society is: Po Box 4, Unity, ME 04988
Unity in a culture is very important. If the culture does not have unity, it dies out.
Either one work if you use students' unity or student unity, but not student's unity if there is more than one student being unified.