WordNet sense 1 (marked by correspondence or resemblance):

similar

WordNet sense 2 (conforming in every respect):

comparable, like

WordNet sense 3 (closely similar or comparable in kind or quality or quantity or degree):

same

WordNet sense 4 (being connected either logically or causally or by shared characteristics ):

related, related to

WordNet sense 5 (agreeing in amount, magnitude, or degree):

proportionate, in proportion to

WordNet sense 6 (corresponding in size or degree or extent):

commensurate