If 'Sonnet' has fourteen lines than 'Limerick' has -

• Limerick
 - A funny short poem.
-মূলত এটি হচ্ছে পাঁচ লাইনের মজার ছড়া।- A popular form of short, funny verse that is often nonsensical and rude. Rhyming like aabba. 
- The first collections of limericks in English date from about 1820.

• Example of Limerick - 
'There was an Old Man who supposed
That the street door was partially closed;
But some very large rats
Ate his coats and his hats,
While that futile Old Gentleman dozed.'

• Sonnet:
- A lyric poem of fourteen iambic pentameter lines.
- Often, sonnets use iambic pentameter: five sets of unstressed syllables followed by stressed syllables for a ten-syllable line.
- Sonnets were invented by the Italian poet Giacomo da Lentini during the 1200s.

• Types of Sonnets:
• Italian or Petrarchan Sonnet: 
• English or Shakespearean Sonnet
• Spenserian: 
• Miltonic
• Occitan Sonnets
• Caudate Sonnets
Curtal Sonnets

Source: literarydevices.net