Antonyms for the word "contrastively" can be words like similarly, alike, corresponding, indistinguishable, identically, and uniformly. While contrastively is used when there is a comparison being made, the above-mentioned words signify a certain level of uniformity or similarity in two things. For example, if one were to say "The two paintings are identical," it shows a lack of contrast, making the word "identically" an antonym for contrastively. Similarly, "corresponding" and "uniformly" can also be seen as antonyms as they suggest a level of consistency in comparison, where contrastively emphasizes differences between the two aspects being compared.