cycad family vs Cycadaceae

cycad family and Cycadaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
cycad family	Yes	No	No	No
Cycadaceae	Yes	No	No	No

As nouns, cycad family and Cycadaceae are synonyms defined as:

cycad family and Cycadaceae: ancient palmlike plants closely related to ferns in that fertilization is by means of spermatozoids

Other synonyms of cycad family include family Cycadaceae.

cycad family (noun)	Cycadaceae (noun)
ancient palmlike plants closely related to ferns in that fertilization is by means of spermatozoids	ancient palmlike plants closely related to ferns in that fertilization is by means of spermatozoids