proficiency vs technique

proficiency and technique both are nouns.

Word	Noun	Adjective	Verb	Adverb
proficiency	Yes	No	No	No
technique	Yes	No	No	No

As nouns, proficiency and technique are synonyms defined as:

proficiency and technique: skillfulness in the command of fundamentals deriving from practice and familiarity

proficiency (noun)	technique (noun)
the quality of having great facility and competence	a practical method or art applied to some particular task
skillfulness in the command of fundamentals deriving from practice and familiarity	skillfulness in the command of fundamentals deriving from practice and familiarity