SPELL(1)

NAME
spell - find spelling errors

SYNOPSIS
spell [-biltvx] [-d list] [-h spellhist] [-m a | e | l | m | s] [-s stop] [+extra_list] [file ...]

DESCRIPTION
spell collects words from the named documents and looks them up in a spelling list. Words that neither occur among nor are derivable (by applying certain inflections, prefixes or suffixes) from words in the spelling list are printed on the standard output.

If no files are named, words are collected from the standard input. spell ignores most troff(1), tbl(1), eqn(1), and pic(1) constructions. Copies of all output may be accumulated in the history file, if one is specified.

By default, spell (like deroff(1)) follows chains of included files ( “.so” and “.nx” commands )).

The default spelling list is based on Webster's Second International dictionary and should be fairly complete. Words that appear in the “stop list” are immediately flagged as misspellings, regardless of whether or not they exist in one of the word lists. This helps filter out misspellings (e.g. thier=thy-y+ier) that would otherwise pass. Additionally, the british file is also used as a stop list unless the -b option is specified.

Site administrators may add words to the local word list, /usr/local/share/dict/words or the local stop list, /usr/local/share/dict/stop.

All word (and stop) lists must be sorted in lexicographical order with case folded. The simplest way to achieve this is to use “sort -df”. If the word files are incorrectly sorted, spell will not be able to operate correctly.

The options are as follows:

-b  Check British spelling. Besides preferring centre, colour, speciality, travelled, etc., this option insists upon -ise in words like standardise, Fowler and the OED to the contrary notwithstanding. In this mode, American variants of words are added to the stop list.

-d word_list
    Use the specified word list instead of the default system word list. The word list must be sorted as specified above.

-h spellhist
    Store misspelled words in the specified history file. The output of who -m is appended to the history file after the list of misspelled words.

-i  Instruct deroff(1) to ignore “.so” and “.nx” commands.

-l  Use delatex instead of deroff(1) if it is present on the system.

-m  Enable support for common troff(1) macro packages; this option is passed verbatim to deroff(1). Refer to the --m description in deroff(1) for details.

-s stop_list
    Use the specified stop list instead of the default system stop list. The stop list must be sorted as specified above.

-t  Use detex instead of deroff(1) if it is present on the system.

-v  Print all words not literally in the spelling list in addition to plausible derivations from spelling list words.

-x  Print every plausible stem, prefixed with ‘=’.

+extra_list
    Use extra_list in addition to the default word list. The extra word list must be sorted as specified above.

FILES
/usr/share/dict/words
    Default spelling list
/usr/share/dict/american
    American spelling of certain words
/usr/share/dict/british
    British spelling of certain words
/usr/share/dict/stop
    Default stop list.
/usr/local/share/dict/words
    Local spelling list (optional)
/usr/local/share/dict/stop
    Local stop list (optional)
/usr/libexec/spellprog
    Binary executed by the shell script /usr/bin/spell.

SEE ALSO
deroff(1), look(1), sed(1), sort(1), tee(1), troff(1)

HISTORY
The spell command appeared in AT&T UNIX.

Unlike historic versions, the NetBSD spell command does not use hashed word files. Instead, it uses lexicographically sorted files and the same technique as look(1).

BUGS
The spelling list lacks many technical terms; new installations will probably wish to monitor the output for several months to gather local additions.

British spelling was done by an American.

In -x mode it would be nicer if the stems were grouped with the appropriate word.