Cozy
Part of speech: adjective
Definition: Affording comfort and warmth; snug; social
Part of speech: noun
Definition: A padded or knit covering to keep an item warm, especially a teapot or egg. A padded or knit covering for any item (often an electronic device such as a laptop computer).
Part of speech: verb
Definition: To become snug and comfortable. To become friendly with.
Example sentence: It's OK to pursue speculative ideas because we don't want to be too cozy and safe and assume that we know everything about life in the universe. However, we have to be rigorous and careful and honest and logical and scientifically meticulous when we speculate.
Comfortable
Part of speech: adjective
Definition: Providing comfort and ease; agreeable.Enjoying comfort.Leaving little risk, safely reliable.Amply sufficient, satisfactory.
Example sentence: Proper love should be utterly supportive and comfortable, and it feels like a raincoat or a jacket potato.