gymnosperm vs cycad

gymnosperm and cycad both are nouns.

Word	Noun	Adjective	Verb	Adverb
gymnosperm	Yes	No	No	No
cycad	Yes	No	No	No

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

gymnosperm: plants of the class Gymnospermae having seeds not enclosed in an ovary
cycad: any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves

Other hyponyms of gymnosperm include progymnosperm, welwitschia, Welwitschia mirabilis, pteridosperm, seed fern.

gymnosperm (noun)	cycad (noun)
plants of the class Gymnospermae having seeds not enclosed in an ovary	any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves