weeping spruce vs Picea breweriana

weeping spruce and Picea breweriana both are nouns.

Word	Noun	Adjective	Verb	Adverb
weeping spruce	Yes	No	No	No
Picea breweriana	Yes	No	No	No

As nouns, weeping spruce and Picea breweriana are synonyms defined as:

weeping spruce and Picea breweriana: medium-sized spruce of California and Oregon having pendulous branches

Other synonyms of weeping spruce include Brewer's spruce.

weeping spruce (noun)	Picea breweriana (noun)
medium-sized spruce of California and Oregon having pendulous branches	medium-sized spruce of California and Oregon having pendulous branches