par
Word family
Synonym discussion
Sense: noun/2
All five words point to a level of quality used as a reference point, but they differ in scope and register. 'Par' is narrowest: in everyday English it lives almost only inside fixed phrases like 'below par' and 'up to par', and it carries a sense of expected normal condition rather than an explicit measurement. 'Standard' is the most flexible bare noun — you can speak of high standards, set standards, or fall below standards in any field. 'Norm' is statistical and slightly formal: it names what is typical across a group, as in social norms or growth norms. 'Average' is the most neutral and arithmetic — it stresses the middle of a range. 'Benchmark' is the most active: a fixed reference deliberately chosen for comparison, common in business and testing. So you might say 'Marcus felt below par today' (general well-being), 'her work meets our standards' (quality rule), or 'the new model sets a benchmark for the industry' (deliberate reference).
Common collocations
Etymology
Par comes straight from Latin 'par', meaning 'equal' — the same root that gives English 'parity' and 'compare'. It entered English in the late 1500s as a noun meaning equality or equal standing, used in phrases like 'on a par'. The finance sense, naming the original issue price of a share or bond, developed in the 1600s. The golf sense is much later, appearing in late-1800s British golf clubs to name the score a strong player should make on each hole, and quickly spread worldwide with the sport.