All of the same or similar kind or nature:
— A close-knit homogeneous group.

synoniem: homogenous.

Roget 42: simple, uniform, of a piece [Fr.], homogeneous, single, pure, sheer, neat.    unmixed, unmingled^†, unblended, uncombined, uncompounded; elementary, undecomposed; unadulterated, unsophisticated, unalloyed, untinged^†, unfortified, pur et simple [Fr.]; incomplex^†.    free from, exempt from; exclusive.    ... meer laten zien

Roget 16: uniform; homogeneous, homologous; of a piece [Fr.], consistent, connatural^†; monotonous, even, invariable; regular, unchanged, undeviating, unvaried, unvarying.    unsegmented.    ... meer laten zien

Nederlands: homogeen
Pools: jeden, jednorodny, niezróżnicowany, jednolity, homogeniczny