All that is synonyms

adv that is

• in plain english — in clear and simple language
• id est — i.e.: that is
• namely — that is to say; explicitly; specifically; to wit: an item of legislation, namely, the housing bill.
• ie — Internet Explorer
• in other words — that is to say
• as it were — You say as it were in order to make what you are saying sound less definite.