Having many sides; polygonal / Having many aspects

A certain number of / Great in number; very numerous; a large number of

An expression of gratitude, expressing greater gratitude than thank you or thanks.

unspecified number / what number

A substantial number of

Consisting of many kinds; sundry

A substantial number of

Composed of multiple bodies.

(mathematics, logic, of a relationship between two sets) having the property that many elements of one set may be assigned by the relationship to one element in the other set, and that a given element in the first set can be assigned by only one member of the second set.

(mathematics, of a function) Having the property that the same argument may yield multiple values, but different arguments never yield the same value.