Like things?

• "Good as gold" et al
• Some tropes
• Phrases with "as a" in the middle
• "Good as gold" and "fresh as a daisy"
• "Fresh as a daisy" and others
• Figures of speech often including "as a"
• Literary figures?

Wiktionary Word definitions in Wiktionary
n. (plural of simile English)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Simile \Sim"i*le\, n.; pl. Similes . [L., from similis. See Similar .] (Rhet.) A word or phrase by which anything is likened, in one or more of its aspects, to something else; a similitude; a poetical or imaginative comparison. A good swift simile, but ...