rigid

As adjectives the difference between astringent and rigid

is that astringent is sharp, caustic, severe while rigid is rigid.

As a noun astringent

is a substance which draws tissue together, thus restricting the flow of blood.

As adjectives the difference between rigid and undefined

is that rigid is rigid while undefined is lacking a definition or value.

As adjectives the difference between rigid and feeble

is that rigid is rigid while feeble is deficient in physical strength; weak; infirm; debilitated.

As a verb feeble is

(obsolete) to make feeble; to enfeeble.

As an adjective rigid

is rigid.

As a noun stiffness is

rigidity or a measure of rigidity.

As an adjective rigid

is rigid.

As a noun hardness is

the quality of being hard.

As an abbreviation fix

is (clotting factor ix).

As an adjective rigid is

rigid.

Rigid is a related term of acrimonious.

As adjectives the difference between rigid and acrimonious

is that rigid is rigid while acrimonious is angry, acid, and sharp in delivering argumentative replies: bitter; mean-spirited; sharp in language or tone.

Rigid is a synonym of unmitigated.

As adjectives the difference between rigid and unmitigated

is that rigid is rigid while unmitigated is not mitigated.

Rigid is a related term of keen.

As adjectives the difference between rigid and keen

is that rigid is rigid while keen is showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense.

As a verb keen is

(rare) to sharpen; to make cold or keen can be to utter a keen.

As a noun keen is

a prolonged wail for a deceased person.

As adjectives the difference between callous and rigid

is that callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others while rigid is rigid.