- amorphous, formless, shapeless - having no definite form or distinct shape; "amorphous clouds of insects"; "an aggregate of formless particles"; "a shapeless mass of protoplasm"
Antonym: formed (indirect, via unformed)
- formless - having no physical form; "belief in a world filled with...formless but often malevolent beings"
Antonym: bodied (indirect, via unbodied)