spermatophyte vs phanerogam

spermatophyte and phanerogam both are nouns.

Word	Noun	Adjective	Verb	Adverb
spermatophyte	Yes	No	No	No
phanerogam	Yes	No	No	No

As nouns, spermatophyte and phanerogam are synonyms defined as:

spermatophyte and phanerogam: plant that reproduces by means of seeds not spores

Other synonyms of spermatophyte include seed plant.

spermatophyte (noun)	phanerogam (noun)
plant that reproduces by means of seeds not spores	plant that reproduces by means of seeds not spores