The word spaciousness refers to the quality of being large, roomy and airy. Synonyms for this word include openness, breadth and vastness. Other synonyms include expansiveness, ample, generous and commodious. These words all convey a sense of having plenty of space, and are often used to describe physical spaces such as homes or outdoor areas. They can also refer to broader concepts like mental, emotional or spiritual room. Taken together, these synonyms offer a range of ways to describe the feeling of having ample space, whether it's in a room, a relationship, or in life itself.