This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Lacking courage or willpower.

adj. Biology Having no spiny processes.

adj. Biology Lacking a spinal column; invertebrate.

adj. Having no spine

adj. uncourageous

adj. Having no spine, or vertebral column.

adj. Having no thorns or barbs.

adj. lacking in strength of character; cowardly, in a physical or moral sense.

Having no spine or spinal column; invertebrate.

Having no backbone, vigor, or courage; limp; weak; nerveless.

Having the backbone flexible or supple.

In ichthyology, having no fin-spines; soft-finned; anacanthine; malacopterous: as, the spineless fishes, or Anacanthini.

adj. lacking a backbone or spinal column

adj. lacking thorns

adj. lacking spiny processes

adj. weak in willpower, courage or vitality

"She smiled as she made the word "spineless" into a compliment."

unarmed    weak   

spineless perch   

spinelessness   

smooth    weak    irresolute   

bumble    half-witted    gutless    unambitious    indecisive    self-pitying    incompetent    veriest    dodder    unavailing