Nail down and Rubberstamp

Nail down verb - Make final; put the last touches on; put into final form.

Rubberstamp and nail down are semantically related In some cases you can replace term "Rubberstamp" with "Nail down", this verbs are similar.

Rubberstamp verb - Stamp with a rubber stamp, usually an indication of official approval on a document.

Nail down and rubberstamp are semantically related in declare the truth of something topic. Sometimes you can use "Nail down" instead a verb "Rubberstamp".