shield vs shellfish

shield and shellfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
shield	Yes	No	Yes	No
shellfish	Yes	No	No	No

shield (noun)	shellfish (noun)
hard outer covering or case of certain organisms such as arthropods and turtles	invertebrate having a soft unsegmented body usually enclosed in a shell
armor carried on the arm to intercept blows	meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean)
a protective covering or structure

shield (verb)	shellfish (verb)
protect, hide, or conceal from danger or harm
hold back a thought or feeling about