inertial guidance vs inertial navigation

inertial guidance and inertial navigation both are nouns.

Word	Noun	Adjective	Verb	Adverb
inertial guidance	Yes	No	No	No
inertial navigation	Yes	No	No	No

As nouns, inertial guidance and inertial navigation are synonyms defined as:

inertial guidance and inertial navigation: a method of controlling the flight of a missile by devices that respond to inertial forces

inertial guidance (noun)	inertial navigation (noun)
a method of controlling the flight of a missile by devices that respond to inertial forces	a method of controlling the flight of a missile by devices that respond to inertial forces