bryophyte vs liverwort

bryophyte and liverwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
bryophyte	Yes	No	No	No
liverwort	Yes	No	No	No

As nouns, liverwort is a hyponym of bryophyte; that is, liverwort is a word with a more specific, narrower meaning than bryophyte:

bryophyte: any of numerous plants of the division Bryophyta
liverwort: any of numerous small green nonvascular plants of the class Hepaticopsida growing in wet places and resembling green seaweeds or leafy mosses

Other hyponyms of bryophyte include moss, hepatic.

bryophyte (noun)	liverwort (noun)
any of numerous plants of the division Bryophyta	any of numerous small green nonvascular plants of the class Hepaticopsida growing in wet places and resembling green seaweeds or leafy mosses