areca raeca aerca earca reaca eraca arcea racea acrea carea rcaea craea aecra eacra acera caera ecara ceara recaa ercaa rceaa creaa ecraa ceraa areac raeac aerac earac reaac eraac araec raaec aarec aarec raaec araec aearc eaarc aaerc aaerc eaarc aearc reaac eraac raeac areac earac aerac arcae racae acrae carae rcaae craae arace raace aarce aarce raace arace acare caare aacre aacre caare acare rcaae craae racae arcae carae acrae aecar eacar acear caear ecaar ceaar aeacr eaacr aaecr aaecr eaacr aeacr acaer caaer aacer aacer caaer acaer ecaar ceaar eacar aecar caear acear recaa ercaa rceaa creaa ecraa ceraa reaca eraca raeca areca earca aerca rcaea craea racea arcea carea acrea ecara ceara eacra aecra caera acera
Note: these 'words' (valid or invalid) are all the permutations of the word areca. These words are obtained by scrambling the letters in areca.