Impressive, exciting, heart-stopping, awe-inspiring, magnificent.

Ultramodern, contemporary, stylish, cutting edge.

Antique, old-fashioned, elderly, out-of-date, aged.

To suppose, to imagine, to assume, to guess, to think, to understand, to suspect.

Critical, key, integral, basic, significant, essential.

Identify, recognize, diagnose, define, locate.

Effective, powerful, authoritative, persuasive, inspiring.

Discover, find, identify, observe, notice, reveal.

Extremely large, gigantic, enormous, massive, colossal.

Build, produce, assemble, construct, mass-produce.

Finish, complete, wind up, wrap up, terminate, end.

Donor, benefactor, patron, Good Samaritan, contributor.