adj. 25B6; adjective all the doors looked alike : SIMILAR, (much) the same, indistinguishable, identical, uniform, interchangeable, cut from the same cloth, like (two) peas in a pod, (like) Tweedledum and Tweedledee; informal much of a muchness.
different.
25B6; adverb great minds think alike : SIMILARLY, (just) the same, in the same way/manner/fashion, identically.