Antonyms for the word "recommendation" mainly revolve around negative or opposite attributes. One such antonym is "warning", which suggests caution or restraint. Another antonym is "disapproval", which conveys rejection or lack of recognition. "Opposition" is also an antonym for recommendation, implying resistance or disagreement. Similarly, "criticism" suggests fault-finding or negative assessment of something. Additionally, "dissuasion" can also be used as an antonym, suggesting persuasion against something. In summary, while a recommendation signifies support or endorsement, its antonyms represent various degrees of resistance or negativity.