English Grammar: Enamored with vs Enamored by

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In checking synonyms for enamor, you will see the following substitute words:
fascinate
captivate
bewitch
enchant
enrapture
enthrall
rentice
infatuate
please
arattract
charm
endear
entrance
grab
slay
fall in love with

Any prepositions used with these synonyms may be done so as well with "enamor", making enamored with and enamored by the most common combination being used.