spell [options] [files]Compare the words of one or more named files with the system dictionary and report all misspelled words. System files for spell reside in /usr/lib/spell.
-bCheck for British spelling.
-iIgnore files included with the nroff or troff .so request. No effect if deroff is unavailable.
-lFollow all included files (files named in .so or .nx requests); default is to ignore files that begin with /usr/lib.
-vInclude words that are derived from dictionary list but are not literal entries.
-xShow every possible word stem (on standard error).
+wordlistUse the sorted wordlist file as a local dictionary to add to the system dictionary; words in wordlist are not treated as misspelled.
Run the first pass of spell:
spell file1 file2 > jargon
After editing the jargon file, use it as a list of special terms. The second pass of spell produces genuine misspellings:
spell +jargon file[12] > typos