substantial

Large in size, value, importance, or amount.

• The company reported a substantial increase in quarterly revenue despite rising costs.

• Did you receive a substantial discount on the new software package?

Firmly constructed, solid, or physically strong.

• They built a substantial stone wall to keep livestock off the main road.

• These older houses were built on remarkably substantial foundations.

Relating to the essential nature or main elements of something rather than superficial details.

• The committee reached substantial agreement on the core terms of the merger.

• Are there any substantial differences between these two proposals?