Science
neutron
Some seven letter words ending in N are:BritainbullioncautioncurtaindrunkendungeonemotionenvironerosionfashionfissiongelatinLincolnkitchenmansionmentionmillionmissionovationpassionpelicanportionpuritanvenisonversion
edifice
curve
Metal
catalogues
consequences
YAM
stamp
well cats
Sperm
I have researched and there is no 5 letter L word that is do to with milk but there is a seven letter word- lactose hope this was of help