Antonyms of adj spinous

2 senses of spinous

Sense 1
spinous (vs. spineless), spiny -- (having spines; "the dorsal fin is spinous")

spineless (vs. spinous) -- (lacking spiny processes; "spineless fins")

Sense 2
acanthoid, acanthous, spinous -- (shaped like a spine or thorn)

INDIRECT (VIA pointed) -> pointless, unpointed -- (not having a point especially a sharp point; "my pencils are all pointless")

Similarity of adj spinous

2 senses of spinous

Sense 1
spinous (vs. spineless), spiny -- (having spines; "the dorsal fin is spinous")

Sense 2
acanthoid, acanthous, spinous -- (shaped like a spine or thorn)
       => pointed (vs. pointless) -- (having a point)