What do you call two people with the same age? I'm not looking for age range or age group.
Generally we Americans, if we have need to refer to some such group, will either say people the same age, or, in some contexts, refer to The Class of 1960, referring to high school or college graduation year. Demographers sometimes refer to people born the same year as (for example) the Cohort of 1942. I happen to be a member of both of these groups.
You can call them age-mates:
age-mate noun one who is of about the same age as another
It's very well attested, and what's more, even someone who's not already familiar with it will likely understand it, since mate is used this way in many other compounds (classmate, schoolmate; roommate, housemate; etc.).
James Chandler strikes me as a competent writer and sociopolitical literary critic. In his 1999 book England in 1819: The Politics of Literary Culture and the Case of Romantic Historicism he writes...
...Shelley's poem seems to depend on a strong sense that the new birth of literature in his time goes hand-in-hand with the conascent monstrosity of Modern Criticism. (link to Google Books excerpt)
I'm aware that some "neo-mystic" promoters of Eastern philosophy have their own very different (and very obscure) definition for this word, but it's clear to me Chandler is using it in the most accessible sense (born/starting at the same time). Here are a few more supporting instances.
The term peers can be used for people of the same age, but it is not restricted to this sense, as it also means people of the same status or abilities. With the suitable context, however, it can refer to the age only, as in: Teenagers want to be accepted by their peers.
I have found "contemporary".
Citation from here:
- existing, occurring, or living at the same time; belonging to the same time: Newton's discovery of the calculus was contemporary with that of Leibniz.
- of about the same age or date: a Georgian table with a contemporary wig stand.
- of the present time; modern: a lecture on the contemporary novel.
Contemporary often refers to persons or their acts or achievements: Hemingway and Fitzgerald, though contemporary, shared few values
But I don't feel it OK.
Citation from the same source:
Coeval refers either to very long periods of time—an era or an eon—or to remote or long ago times: coeval stars, shining for millenia with equal brilliance; coeval with the dawning of civilization. So, it doesn't fit.
In Russian I know 3 words of the demanded meaning. But not in English.
I'd call them isochrones, repurposing the word which is used to describe a type of curve derived from the prefix iso and suffix chrone, to denote the same time period.
One example of two people who are the same age is twins
twin noun - either of two children or animals brought forth at a birth.
Since they are born together, they have the almost the same age. Not exactly the same, as Robusto correctly points out, since one will exit the womb first. This is as close to the same age as I think one can reasonably get.