groundbreaker vs pioneer

groundbreaker and pioneer both are nouns.

Word	Noun	Adjective	Verb	Adverb
groundbreaker	Yes	No	No	No
pioneer	Yes	No	Yes	No

As nouns, groundbreaker and pioneer are synonyms defined as:

groundbreaker and pioneer: someone who helps to open up a new line of research or technology or art

Other synonyms of groundbreaker include innovator, trailblazer.

groundbreaker (noun)	pioneer (noun)
someone who helps to open up a new line of research or technology or art	one of the first colonists or settlers in a new territory
	someone who helps to open up a new line of research or technology or art

groundbreaker (verb)	pioneer (verb)
	open up and explore a new area
	open up an area or prepare a way
	take the lead or initiative in; participate in the development of