However, you could consider near rhymes or slant rhymes:
Near Rhymes:
* earna (not a common word, but a possible near rhyme)
* varna (a Hindi word meaning "caste")
* verna (a type of vernacular language)
Slant Rhymes:
* burn, turn, yearn (These don't rhyme perfectly, but they have a similar vowel sound)
* learn, stern, fern (Again, not perfect rhymes but share a similar vowel sound)
Ultimately, the best rhyming word for "dearna" depends on the context and the desired effect of the rhyme.