Rare is a related term of chary.
In obsolete|lang=en terms the difference between rare and chary
is that
rare is (obsolete) early while
chary is (obsolete) sad; sorrowful; grievous.
As adjectives the difference between rare and chary
is that
rare is (cooking|particularly meats) cooked very lightly, so the meat is still red (in the case of steak or beef in the general sense) or
rare can be very uncommon; scarce or
rare can be (obsolete) early while
chary is (obsolete) sad; sorrowful; grievous.
As a verb rare
is (us|intransitive) to rear, rise up, start backwards.