aircraftman vs aircraftsman

aircraftman and aircraftsman both are nouns.

Word	Noun	Adjective	Verb	Adverb
aircraftman	Yes	No	No	No
aircraftsman	Yes	No	No	No

As nouns, aircraftman and aircraftsman are synonyms defined as:

aircraftman and aircraftsman: a noncommissioned officer in the British Royal Air Force

aircraftman (noun)	aircraftsman (noun)
a noncommissioned officer in the British Royal Air Force	a noncommissioned officer in the British Royal Air Force