solid

very hard and firm

completely hard and firm, with no gaps or softness

entirely hard and firm, with no gaps or softness

very hard and firm

sufficiently hard and firm

quite hard and firm

nearly in a solid state

almost in a solid state

appearing to be solid on the surface

seeming to be solid based on available evidence

extremely strong, dependable, and unchanging

very reliable and strong

completely reliable and strong

very reliable and strong

always reliable or strong over time

quite reliable and strong

quite reliable or strong in comparison to others

to a fair degree; quite reliable or strong

more reliable or strong than expected

describes the state of being firm and hard

to become completely frozen and hard

to appear firm and hard by sight

to give the impression of being firm and hard

to have the sensation of being firm to the touch

to transition from a liquid/gas state to a solid state

to transition from a liquid/gas state to a solid state, often implying a process

to cause someone or something to become solid or firm

to be reliable, dependable, or strong

to appear reliable or strong

to give the impression of being reliable or strong

to continue to be reliable and strong

to seem dependable and well-founded

to develop into a reliable or strong state