ejector seat vs ejection seat

ejector seat and ejection seat both are nouns.

Word	Noun	Adjective	Verb	Adverb
ejector seat	Yes	No	No	No
ejection seat	Yes	No	No	No

As nouns, ejector seat and ejection seat are synonyms defined as:

ejector seat and ejection seat: a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute

Other synonyms of ejector seat include capsule.

ejector seat (noun)	ejection seat (noun)
a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute	a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute