orange grass vs pineweed

orange grass and pineweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
orange grass	Yes	No	No	No
pineweed	Yes	No	No	No

As nouns, orange grass and pineweed are synonyms defined as:

orange grass and pineweed: annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers

Other synonyms of orange grass include Hypericum gentianoides, nitweed, pine-weed.

orange grass (noun)	pineweed (noun)
annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers	annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers