waveguide vs wave guide

waveguide and wave guide both are nouns.

Word	Noun	Adjective	Verb	Adverb
waveguide	Yes	No	No	No
wave guide	Yes	No	No	No

As nouns, waveguide and wave guide are synonyms defined as:

waveguide and wave guide: a hollow metal conductor that provides a path to guide microwaves; used in radar

waveguide (noun)	wave guide (noun)
a hollow metal conductor that provides a path to guide microwaves; used in radar	a hollow metal conductor that provides a path to guide microwaves; used in radar