As nouns the difference between terms and pennage
is that terms is while pennage is the confining of animals in pens or pennage can be (obsolete) feathery covering; plumage.
terms
English
Noun
(head)
Statistics
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pennage
English
Etymology 1
Noun
(
en noun)
The confining of animals in pens.
A fee paid for the accommodation of animals in pens.
Etymology 2
(
etyl) (
lena) (
penna) feather.
Noun
(obsolete) feathery covering; plumage
- (Holland)
(
Webster 1913)