crab vs Brachyura

crab and Brachyura both are nouns.

Word	Noun	Adjective	Verb	Adverb
crab	Yes	No	Yes	No
Brachyura	Yes	No	No	No

crab (noun)	Brachyura (noun)
a stroke of the oar that either misses the water or digs too deeply	an order of crustaceans (including true crabs) having a reduced abdomen folded against the ventral surface
decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
a louse that infests the pubic region of the human body
the edible flesh of any of various crabs
a quarrelsome grouch

crab (verb)	Brachyura (verb)
complain
fish for crab
scurry sideways like a crab
direct (an aircraft) into a crosswind