different between seedeater vs seedful

English

seed +? eater

seedeater (plural seedeaters)

(literally) An individual or species which eats seeds.
A bird species which feeds mainly on seeds.
Most seedeaters have strong, typically shaped bills.
Any bird in the genus Sporophila of the tanager family, Thraupidae
Any bird in the genus Amaurospiza, now classified in the family Cardinalidae

seed +? -ful

seedful (comparative more seedful, superlative most seedful)

Full of seed, richly bearing seed.
- 1840-1864, George Henry Calvert, Cabiro
  The seedful furrows each with quickness sows.
(figuratively) Rich in promise.

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