liliopsid family vs monocot family

liliopsid family and monocot family both are nouns.

Word	Noun	Adjective	Verb	Adverb
liliopsid family	Yes	No	No	No
monocot family	Yes	No	No	No

As nouns, liliopsid family and monocot family are synonyms defined as:

liliopsid family and monocot family: family of flowering plants having a single cotyledon (embryonic leaf) in the seed

liliopsid family (noun)	monocot family (noun)
family of flowering plants having a single cotyledon (embryonic leaf) in the seed	family of flowering plants having a single cotyledon (embryonic leaf) in the seed