Transphobia
Refers to any manifestation of rejection of and discrimination against trans* people or trans* issues in general.
Homophobia
A general term that overlaps gayphobia and lesbophobia, and includes any manifestation of rejection or discrimination (ranging from insults to physical assault to murder) against lesbian and gay people or homosexuality in general. Lesbophobia refers to those forms of homophobia that are specifically directed at lesbian women, with the double penalty of sexism and homophobia. Gayphobia refers to forms of homophobia that target gay men.
Heterosexism
An ideology that prioritizes sexualities by postulating the superiority and the promotion of heterosexuality. It assumes that there is only one valid and normal sexual and emotional orientation, heterosexuality.