crab vs Phthirus

crab and Phthirus both are nouns.

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

crab (noun)	Phthirus (noun)
a stroke of the oar that either misses the water or digs too deeply	true lice: crab lice
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)	Phthirus (verb)
complain
fish for crab
scurry sideways like a crab
direct (an aircraft) into a crosswind