astronautic vs astronautical

astronautic and astronautical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
astronautic	No	Yes	No	No
astronautical	No	Yes	No	No

As adjectives, astronautic and astronautical are synonyms defined as:

astronautic and astronautical: of or belonging to astronauts or the science of astronautics

astronautic (adjective)	astronautical (adjective)
of or belonging to astronauts or the science of astronautics	of or belonging to astronauts or the science of astronautics