In botany|lang=en terms the difference between filament and ovary
is that
filament is (botany) the stalk of a stamen in a flower, supporting the anther while
ovary is (botany) the lower part of a pistil or carpel that bears ovules and ripens into fruit.
As nouns the difference between filament and ovary
is that
filament is a fine thread or wire while
ovary is (anatomy) a female reproductive organ, often paired, that produces ova and in mammals secretes the hormones estrogen and progesterone.