The synonym of the word "ironic" is "disguisedly sarcastic".

Explanation:

The word "ironic" is an adjective that describes a situation or statement that is the opposite of what is expected or intended. It often involves a discrepancy between what is said and what is meant, leading to a sense of humor or mockery.

On the other hand, the phrase "disguisedly sarcastic" means that something is said or done with a hidden or subtle form of mocking or ridicule. It implies that the speaker or writer is expressing their thoughts in a way that is not immediately obvious but still conveys a sense of sarcasm.

To understand the similarity between these two terms, let's break down the meanings of both words:

- Ironic: This term refers to a situation in which the outcome is contrary to what was expected or intended. It often involves a humorous or satirical twist. For example, if someone who is always late for meetings becomes a time management expert, it would be considered ironic.

- Disguisedly sarcastic: This phrase implies that someone is expressing their thoughts or opinions in a way that is subtly mocking or ridiculing. It suggests that the sarcasm is not overt but rather concealed or disguised. For instance, if someone says, "Oh, great job! You really excelled at making a mess," it would be an example of disguised sarcasm.

Based on these definitions, we can see that both "ironic" and "disguisedly sarcastic" share a common thread of expressing a contradiction or mockery. In both cases, there is a gap between what is said or done and what is actually meant. Therefore, "disguisedly sarcastic" can be considered a synonym for "ironic".