This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of buttress.

n. a support usually of stone or brick; supports the wall of a building

"The arrival of Bruce Lehman and Allan Timmerman were very important in buttressing the finance side of this research area."

buttressed    buttresses    buttressing   

beef up    fortify    strengthen    reënforce    reinforce   

flying buttress    hanging buttress    nunatak   

buttressed    buttressing    flying buttress   

prop    support    brace    flying buttress    arc-boutant    counterpart    counterfort   

pinnacle    cornice    battlements    spire    parapet    bastion    crag    minaret    turret    rampart