lochia vs liquid body substance

lochia and liquid body substance both are nouns.

Word	Noun	Adjective	Verb	Adverb
lochia	Yes	No	No	No
liquid body substance	Yes	No	No	No

As nouns, liquid body substance is a hypernym of lochia; that is, liquid body substance is a word with a broader meaning than lochia:

lochia: substance discharged from the vagina (cellular debris and mucus and blood) that gradually decreases in amount during the weeks following childbirth
liquid body substance: the liquid parts of the body

Other hypernyms of lochia include bodily fluid, body fluid, humor, humour.

lochia (noun)	liquid body substance (noun)
substance discharged from the vagina (cellular debris and mucus and blood) that gradually decreases in amount during the weeks following childbirth	the liquid parts of the body