if you look in the literature, you'll see references to this historical grouping of anarcho-collectivism.
this refers to a type of anarchism that's built around small scale collectives, or co-operatives. in english, it would probably be better to refer to it as anarcho-cooperativism; it's not collectivism in the sense that the word is generally invoked in the english language, to imply that the individual is unimportant in the face of the group, which is something that is fundamentally incompatible with socialism.
collectivism is really exactly the same thing as fascism - historically, philosophically & linguistically. it got confused with the left during the cold war, as the bolsheviks were really just a different type of fascist. you had fascists in russia, fascists in germany, fascists in italy, fascists in spain & a few fascists in france, too - they were all very different, but the one thing they had in common was that they all based their economic policies on the principles of collectivism.
and, they all brutally targeted actual communists, actual socialists and actual anarchists.
the struggle of anarchism against collectivism is the struggle of the revolutionaries against franco, it is the struggle of makhno against stalin, the struggle of malatesta against mussolini and the struggles of the uncounted leftists that hitler sent to die in the camps.
if you misinterpreted me as an advocate of collectivism, you were sorely mistaken.