is a type of (narrower)
the quality of being alike
"sameness of purpose kept them together"
is an attribute of
marked by correspondence or resemblance
"similar food at similar prices"; "problems similar to mine"; "they wore similar coats"
is an attribute of
not similar
"a group of very dissimilar people"; "a pump not dissimilar to those once found on every farm"; "their understanding of the world is not so dissimilar from our own"; "took different (or dissimilar) approaches to the problem"