The antonyms for the word "more puttylike" can be words like unyielding, inflexible, rigid, firm, hard, tough, durable, and solid. These words signify a state of being un-moldable, resistant to change, and hard to manipulate. Unlike putty, these substances cannot be reshaped or reformed into a new shape, making them the complete opposite of putty. While putty can be soft and malleable, these antonyms indicate an object with a strong structure and a stable form. It is important to know the antonyms of a word to understand its full meaning and context in a sentence.