headscarf, headscarves One word, no hyphen.

health care Two words, noun or adjective.

he/she, his/her Avoid using these constructions; recast the sentence instead.

he and she, his and her Use these sparingly; try to recast the sentence instead. Helpful techniques for achieving gender-neutral language are available in the Chicago Manual of Style,Section 5.225.

high school Two words, whether used as a noun or adjective: He runs a high school program. She led a group of high school students on a campus tour.

hip-hop (n. and adj.) Hyphenated.

Hispanic A person from—or whose ancestors were from—a Spanish-speaking land or culture. Also see Latino, Latina. While both Latino and Hispanic are generally acceptable, some people have a strong preference. Whenever possible, it is best to use a more specific identification, such as Cuban, Mexican, Venezuelan, etc.

history Avoid this redundant combination: past history.

home page Two words.

hopefully This word means in a hopeful manner. Do not use it to mean “it is hoped,” “let us hope,” or “we hope.”

homosexual See gay, lesbian.

hourlong One word, no hyphen. Also: monthlong, yearlong.

HTML Acceptable in all references for HyperText Markup Language; lowercase when part of a Web address.

hydro-, hyper- In general, no hyphen when these are used as a prefix: hydroelectric, hydroponic; hyperactive, hypercritical, hypertext. See Words Formed with Prefixes under General Style Preferences.

Updated March 23, 2014