This list of words that may be spelled with a ligature in English encompasses words which have letters that may, in modern usage, either be rendered as two distinct letters or as a single, combined letter. This includes AE being rendered as Æ and OE being rendered as Œ.
Until the early twentieth century, the œ and æ ligatures had been commonly used to indicate an etymological connection with Latin or Greek. Since then they have fallen out of fashion almost completely and are now only used occasionally. They are more commonly used for the names of historical people, to evoke archaism, or in literal quotations of historical sources. These ligatures are proper letters in some Scandinavian languages, and so are used to render names from those languages, and likewise names from Old English. Some American spellings replace ligatured vowels with a single letter; for example, gynæcology or gynaecology is spelled gynecology.
The fl and fi ligatures, among others, are still commonly used to render modern text in fine typography. Page-layout programs such as QuarkXPress and Adobe InDesign can be configured to automatically replace the individual characters with the appropriate ligatures. However this is a typographic feature and not part of the spelling.

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