Words that Rhyme with informal
2 Syllable Words
formal, normal
3 Syllable Words
abnormal
4 Syllable Words
paranormal
Definitions of informal
a. Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit.
a. Deranged in mind; out of one's senses.