Here's what rhymes with heterosexism.

Consider these alternatives

homophobia / phobia classism / given bureaucratism / given textuality / personality casteism / horizon cosmopolitanism / given speciesism / given bossism / given postcolonialism / given cysticercosis / tuberculosis quetiapine / seen heterosexuality / personality governmentality / personality westernisation / information ahistorical / historical criminalization / relation creolization / relation