I'm 49 and forgot some terminology. Could someone tell me what "comparison of equality" means? I could use an example. I think it means an analogy. I need to write a sample test item. Thanks. L
this can be used with either nouns, adjectives, or adverbs, but maj is right, the form is AS...AS

most people have as many fingers as toes.

grammar is not as easy as you may think!

he does not sing nearly as well as i do.
I would say the comparison of equalitity is as... as.

You are as old as some of my friends.
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 moijelesuis's reply was promoted to an answer.
comparison of equality is used to show that two things, people are similar. There is no difference between the subject and the object.It can be used with adjectives, adverbs and nouns.
the rule: S + V + as + adjective + as + O
S + V + as + adverb + as + O
S + V + as + much / many + Noun + as + O

Eg: John is 16 years old. Peter is 16 years old.
John is as ols as Peter.
Patrick speaks English as fluently as Sandra.
There are as many people in this room as in the next room.

Hope my answer helps you.