1. Head of a former executive department; combined with the Navy Secretary to form the Defense Secretary in 1947
   - Secretary of War

Type of: secretaryship

• isoleucine
• isoline
• isomer
• isomerase
• isomeric
• isomerisation
• isomerise
• isomerism
• isomerization
• isomerize
• isometric
• isometric exercise
• isometric line
• isometrical
• isometrics
• isometropia
• isometry
• isomorph
• isomorphic
• isomorphism
• isomorphous
• isomorphy
• isoniazid
• isophote
• isopleth