acrostic /ə-krosˈtik/

1. A poem or puzzle in which the first (or last) letters of each line spell a word or sentence
2. An acronym

acrosˈtically adverb

• umbrageousnesses
• umbrages
• umbraging
• umbral
• umbras
• umbrated
• umbratic
• umbratical
• umbratile
• umbratilous
• umbre
• umbrel
• umbrella
• umbrella-ant
• umbrella-ants
• umbrella bird
• umbrella birds
• umbrella'd
• umbrellaed
• umbrella fir
• umbrella firs
• umbrella group
• umbrella groups
• umbrella organization
• umbrella organizations