Answer: the same letter or sound at the beginning of adjacent or closely connected words (i.e. <u>s</u>wift <u>s</u>eagulls <u>s</u>leep <u>s</u>oundly)
Disguise would the answer for your question
Synonyms: consequently, so, as a result, hence, thus, accordingly, for that reason, ergo, that being the case, on that account;