The word "familiar" has a range of synonyms that can be used to avoid repetition in writing or speech. Some of the synonyms for "familiar" include "well-known", "recognizable", "acquainted", "friendly", "intimate", "casual", "informal", "common", "popular", "usual", "routine", "unremarkable", "mundane", "everyday", "ordinary", "frequent", "regular", "recurring" and "habitual". Depending on the context, one of these synonyms can convey a slightly different shade of meaning to bring nuance to a piece of writing or speech.