Iridaceous is an adjective that refers to plants that belong to the family Iridaceae, which includes popular flowers like irises and crocuses. If you're looking for synonyms for iridaceous, you could consider using botanical terms like Iridopsida, Iris, or Iridaceae. Other options might include descriptive words like colorful, showy, vibrant, or stunning, which convey the beauty and eye-catching qualities of iridaceous flowers. Alternatively, you could use words like bulbous, cormous, or rhizomatous, which describe the underground structures that many iridaceous plants use for storage and propagation. Whatever words you choose, they should capture the essence of iridaceous plants and their unique beauty.