taichi vs tai chi

taichi and tai chi both are nouns.

Word	Noun	Adjective	Verb	Adverb
taichi	Yes	No	No	No
tai chi	Yes	No	No	No

As nouns, taichi and tai chi are synonyms defined as:

taichi and tai chi: a Chinese system of slow meditative physical exercise designed for relaxation and balance and health

Other synonyms of taichi include t'ai chi, t'ai chi chuan, tai chi chuan, taichichuan.

taichi (noun)	tai chi (noun)
a Chinese system of slow meditative physical exercise designed for relaxation and balance and health	a Chinese system of slow meditative physical exercise designed for relaxation and balance and health