As proper nouns the difference between lind and lindy
is that lind is while lindy is a pet form of female given names, such as linda and lindsay.
As a noun lindy is
a dance step.
lind
English
Noun
(
en noun)
(obsolete) the lime tree, or linden tree
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lindy
English
Noun
(
en noun)
a jitterbug, originated in Harlem (New York)