As nouns the difference between foal and foaf

is that foal is a young (male or female) horse, especially just after birth or less than a year old while foaf is .

As a verb foal

is (equestrian) to give birth; to bear offspring.

As nouns the difference between filly and fill

is that filly is a young female horse while fill is a sufficient or more than sufficient amount.

As a verb fill is

to occupy fully, to take up all of.

As a proper noun Fill is

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As a noun filly

is a young female horse.

As a proper noun billy is

a diminutive of the male given name william.

As a noun filly

is a young female horse.

As a proper noun willy is

a male given name, diminutive of william.

As nouns the difference between filly and folly

is that filly is a young female horse while folly is foolishness.

As nouns the difference between filly and tilly

is that filly is a young female horse while tilly is .

As a proper noun tilly is

or tilly can be .

As a noun filly

is a young female horse.

As an adverb fully is

in a full manner; without lack or defect.

As nouns the difference between filly and felly

is that filly is a young female horse while felly is the outer rim of a wheel, supported by the spokes.

As an adverb felly is

fiercely, harshly.

As a noun filly

is a young female horse.

As an adverb fitly is

in a fit manner; suitably; properly; commodiously; conveniently.

As a noun filly

is a young female horse.

As an adjective frilly is

having frills; frilled.