According to Mayo Clinic, Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease in a person. So calling people with this syndrome 'Mongoloid' is extremely vulgar and disrespectful to ethnic Mongolians. Likewise, how will the population react if Down Syndrome was associated with 'European' looks? If you use this term, you are automatically a xenophobic, in my opinion.
If any difference is noteworthy, it would probably be that an age is usually between two times, e.g. 1290-1450AD, whereas an era is less set - but that isn't a rule, its just a matter of usage. Synonyms would be epoch, or eon. Source(s):
Although the words earnings and wages are often used interchangeably, the differences between the two can be significant. When someone has no income other than wages, it's correct to use the terms to mean the same thing.ages are the money your employer pays you for the hours you work each week. A salary, on the other hand, typically defines a fixed amount your employer pays you, not necessarily for specific hours worked but for completing the duties of your job.