Liken to
Definition 1 of 1
Pro Tip 1/3Visual Similarity
Use 'liken to' when highlighting visual or conceptual similarities between different things. 
She likened the clouds to fluffy cotton balls.
Pro Tip 2/3Exaggeration Caution
'Liken to' sometimes exaggerates similarities for dramatic effect or humor. 
He likened his tiny apartment to a spacious palace.
Pro Tip 3/3Unexpected Comparisons
The phrase can be used to draw novel or surprising comparisons that aren't immediately obvious. 
The poet likened the sound of rain to a symphony.