flowering crab vs Bechtel crab

flowering crab and Bechtel crab both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowering crab	Yes	No	No	No
Bechtel crab	Yes	No	No	No

As nouns, flowering crab and Bechtel crab are synonyms defined as:

flowering crab and Bechtel crab: derived from the Iowa crab and cultivated for its large double pink blossoms

flowering crab (noun)	Bechtel crab (noun)
small tree or shrub of southeastern United States; cultivated as an ornamental for its rose-colored blossoms	derived from the Iowa crab and cultivated for its large double pink blossoms
derived from the Iowa crab and cultivated for its large double pink blossoms