There are no 7 letter words that are the meaning of milk. There are several words related to milk including pasteurized, homogenized and condensed.
7-letter synonyms are textile or fabrics.
Caribou
abscondabridgeactressagelessagonizeaimlessairportanswersanglinganklingappriseappealsappliedapprovearmholearticlearrangeartworkaspiredassuredastoundassuageaverageavoidedawesomeawkward
A seven letter word for "sheds light" is lantern.As in "pass me that lantern".
decayed
Vermeer
A seven letter word for lasts is endures.
command
doorway
Eastern
flagged
Foolish
cardiac
Muffler
Treifeh
tumbler
quantum