221. associated with

222. association n.

223. assume v.

224. assure v.

225. at prep.

226. atmosphere n.

227. atom n.

228. attach v.

229. attached adj.

230. attack n., v.

231. attempt n., v.

232. attempted adj.

233. attend v.

234. attention n.

235. pay attention

236. attitude n.

237. attorney n. (especially NAmE)

238. attract v.

239. attraction n.

240. attractive adj.