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".
tankard
A seven letter word for lasts is endures.
Vermeer
command
doorway
Eastern
cardiac
Foolish
Muffler
Treifeh
quantum
flagged
tumbler