spectroscopical vs spectroscopic

spectroscopical and spectroscopic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spectroscopical	No	Yes	No	No
spectroscopic	No	Yes	No	No

As adjectives, spectroscopical and spectroscopic are synonyms defined as:

spectroscopical and spectroscopic: of or relating to or involving spectroscopy

spectroscopical (adjective)	spectroscopic (adjective)
of or relating to or involving spectroscopy	of or relating to or involving spectroscopy