Braxton-Hicks contraction vs false labor

Braxton-Hicks contraction and false labor both are nouns.

Word	Noun	Adjective	Verb	Adverb
Braxton-Hicks contraction	Yes	No	No	No
false labor	Yes	No	No	No

As nouns, Braxton-Hicks contraction and false labor are synonyms defined as:

Braxton-Hicks contraction and false labor: painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency

Braxton-Hicks contraction (noun)	false labor (noun)
painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency	painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency