Common words that rhyme with firth include mirth, forth, dearth, earth, warmth, truth, mouth, health, length, loath, mammoth, breath, faith, wealth and warpath.
She gave a made-up date of birth.
That’s not worth the trouble.
God created the heavens and earth.
A fire can kindle warmth inside.
The park was filled with cheerful people.
No one knows the truth.