senior (at work or school)

junior (at work, school, etc.)

I ②we

someone who is greatly one's senior

producing (people) in great numbers

young person

inexperienced person

person older than oneself (who has more life experience)

fellows

persons of the same age

small fry

colleagues

underling

worldlings

comrade

underling

inferior

set

the aged

we

comrade

party (of people)

lawless people

suffixed to words indicating a class of people to create a plural (esp. in impolite contexts)