What's a group of similar things called

Answer 1

a kind
a type
a category
similar

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Answer 2

https://www.google.com/search?source=hp&ei=O26_XJbhG8aAtgWBmp-YBg&q=group+of+similar+things&btnK=Google+Search&oq=group+of+similar+things&gs_l=psy-ab.3..0l4j0i22i30l6.3371.3371..4004...0.0..0.116.116.0j1......0....2j1..gws-wiz.....0.kV2sCfZ7XMY

Answer 3

Looking at things that are similar is called
1 contrast
2 comparing
3 evaluations
4 sublimating