The adj similar has 5 senses (first 2 from tagged texts)
1. (65) similar -- (marked by correspondence or resemblance; "similar food at similar prices"; "problems similar to mine"; "they wore similar coats")
2. (7) alike, similar, like -- (having the same or similar characteristics; "all politicians are alike"; "they looked utterly alike"; "friends are generally alike in background and taste")
3. like, similar -- (resembling or similar; having the same or some of the same characteristics; often used in combination; "suits of like design"; "a limited circle of like minds"; "members of the cat family have like dispositions"; "as like as two peas in a pod"; "doglike devotion"; "a dreamlike quality")
4. similar -- ((of words) expressing closely related meanings)
5. exchangeable, interchangeable, similar, standardized, standardised -- (capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability; "interchangeable electric outlets" "interchangeable parts")