The term "most trochilic" is quite specific and refers to something that is most suitable or appealing to hummingbirds. If you're looking for synonyms that convey a similar idea, you could use the words "nectar-rich," "floral," "sugary," or "sweet." These words all suggest something that would attract hummingbirds and may apply to plants, flowers, or other natural items that hummingbirds might be drawn to. You could also use the word "nectarous," which specifically refers to producing or containing nectar, which is a favorite food of hummingbirds. Other related words may include "nectariferous," "nectareous," or "nectarlike".