Stamps With Words And/Or Numbers As The Main Design

United Nations
The 75th Anniversary of United Nations
October 24, 2020
Motif: UN75 by graphic designer Matt Willey

Here is the Netherlands's 1876-94 four-stamp set (Sc #s 34-7) of low values.

France
Stamps of Message
January 12, 2004
Motifs: ceci est une invitation and un grand merci

Italy
Centenary of the Founding of Assonime
June 17, 2010
Main design: 100 and assonime

This 1500 zloty stamp (Sc #2975) of Poland was issued on July 20,1940 to commemorate the 50th anniversary of the Katyn massacre.

From wikipedia, The Katyn massacre was a series of mass executions of nearly 22,000 Polish military officers and intelligentsia prisoners off war carried out by the Soviet Union, specifically the NKVD (People's Commission for Internal Affairs, the Soviet secret police) in April and May 1940."

The 5 lepta value/cost is not shown on this November 1915 postal tax stamp (Sc #RA2C) of Greece. Tax proceeds went to the Greek Women's Patriotic League.

USA
August 17, 2007
Celebrate!, 41c
Scott #4196

Peru
The 9th International Pacific Fair
November 21, 1975
Main design: 9

Azerbaijan
25th Anniversary of the Baku-Ceyhan Pipeline
September 20, 2019
One of the designs shows the numeral 25 in the form of pipelines.

Here is the 7 krone value (Facit #1295) from Denmark's March 28, 2001 "Use the Language" two-stamp set.

Netherlands Antilles
London International Stamp Exhibition
May 6, 1980
One of the designs shows London 1980.

Germany
Otl Aicher Graphic Artist
May 5, 2022
Main design: Deutschland Eine Briefmarke im Wert von

On November 16, 2003 Syria issued this 15 pound value (Sc #1530) to commemorate the 33rd anniversary of the Revolution of November 16, 1970.

This 2.50 dollar stamp (Sc #374a) is from Anguilla's December 10, 1979 four-value souvenir sheet commemorating the London 1980 International Stamp Exhibition of May 6-14, 1980.

Guernsey
EUROPA – The Letter
May 15, 2008
The stamp set shows words used in letter writing.