pearl vs ivory

pearl and ivory both are nouns.

Word	Noun	Adjective	Verb	Adverb
pearl	Yes	No	Yes	No
ivory	Yes	No	No	No

As nouns, pearl and ivory are synonyms defined as:

Other synonyms of pearl include bone, off-white.

pearl (noun)	ivory (noun)
a shade of white the color of bleached bones	a shade of white the color of bleached bones
a smooth lustrous round structure inside the shell of a clam or oyster; much valued as a jewel	a hard smooth ivory colored dentine that makes up most of the tusks of elephants and walruses
a shape that is spherical and small

pearl (verb)	ivory (verb)
gather pearls, from oysters in the ocean