As adjectives the difference between downline and downlike
is that downline is while downlike is resembling down (soft immature feathers) or some aspect of it.
As a noun downline
is .
downline
English
Adjective
(head)
See also
*upline downlike
English
Adjective
(
en adjective)
Resembling down (soft immature feathers) or some aspect of it.