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companion; fellow; friend; mate; comrade; partner; colleague; coworker; associate
group; company; circle; set; gang
member of the same category (family, class)
「仲間」 has another reading with different meanings.
仲間と一緒に旅行に行ったよ。
I went on a trip with my companions.
ペンギンも鳥の仲間だ。
Penguins are also a kind of bird.
いい仲間に出会えて幸せだね。
I'm happy to have met good companions.