Device would be singular, making devices plural.
Generally any word ending with 's' is plural, making devices plural Device would be singular Hope my answer helped CuriousJade x
The likely word here is "binocular" (the adjective) and "binoculars" which is the singular and plural for a pair of joined telescopic devices.
Bacterium is the singular word.
the singular word it is salmon.
singular
Adenoma is the singular of adenomata.
The word 'Phenomenon' is singular. The plural form is 'Phenomena'.
singular of the word stitches is stitch.
Lance is singular.
The word "hang" is singular.
The word dog is the singular form.
Yes, the word "document" is singular.