The word "singler" typically means something that is individual or lone. Some synonyms for this word include "solitary," "unique," "unmatched," "unrepeated," and "sole." A person who is single in a relationship context can also be referred to as "unattached," "unengaged," or "unmarried." In a financial context, "singler" can be used to describe someone who is the only source of income for their household, in which case it can be replaced with "breadwinner," "provider," or "sole earner." These synonyms can be used to provide variety and specificity when describing things that are single or individual in nature.