binoculars vs field glasses

binoculars and field glasses both are nouns.

Word	Noun	Adjective	Verb	Adverb
binoculars	Yes	No	No	No
field glasses	Yes	No	No	No

As nouns, binoculars and field glasses are synonyms defined as:

binoculars and field glasses: (plural) an optical instrument designed for simultaneous use by both eyes

Other synonyms of binoculars include opera glasses.

binoculars (noun)	field glasses (noun)
(plural) an optical instrument designed for simultaneous use by both eyes	(plural) an optical instrument designed for simultaneous use by both eyes