| FASTNESS | • fastness n. (Uncountable) The quality or state of being fast (in various senses). • fastness n. (Countable) Something that is fast, or that causes someone or something to be fast (in various senses). • FASTNESS n. the quality of being fast. |
| FASTNESSES | • fastnesses n. Plural of fastness. • FASTNESS n. the quality of being fast. |
| STEDFASTNESS | • stedfastness n. Obsolete form of steadfastness. • STEDFASTNESS n. the state of being stedfast. |
| COLORFASTNESS | • colorfastness n. The characteristic of being colorfast. • COLORFAST n. having colours that retain their original hue without running or fading, also COLOURFAST. |
| LIGHTFASTNESS | • lightfastness n. The quality or degree of being lightfast. • LIGHTFAST n. of a fabric, that doesn't fade on exposure to light. |
| SHAMEFASTNESS | • shamefastness n. The state or condition of being shamefast. • SHAMEFAST n. modest, bashful, also SHAMEFACED. |
| SOOTHFASTNESS | • soothfastness n. (Archaic) truth; honesty; veracity. • SOOTHFASTNESS n. the state of being soothfast. |
| STEADFASTNESS | • steadfastness n. Loyalty in the face of trouble and difficulty. • steadfastness n. Steadfast resolution. • STEADFASTNESS n. the state of being steadfast. |
| COLOURFASTNESS | • colourfastness n. Alternative spelling of colorfastness. • colour␣fastness n. (British spelling) the quality of being colourfast. • COLOURFAST n. having colours that retain their original hue without running or fading, also COLORFAST. |
| STEDFASTNESSES | • STEDFASTNESS n. the state of being stedfast. |
| COLORFASTNESSES | • colorfastnesses n. Plural of colorfastness. • COLORFASTNESS n. COLORFAST, having colours that retain their original hue without running or fading, also COLOURFAST. |
| LIGHTFASTNESSES | • lightfastnesses n. Plural of lightfastness. • LIGHTFASTNESS n. LIGHTFAST, of a fabric, that doesn't fade on exposure to light. |
| SHAMEFASTNESSES | • SHAMEFASTNESS n. SHAMEFAST, modest, bashful, also SHAMEFACED. |
| SOOTHFASTNESSES | • SOOTHFASTNESS n. the state of being soothfast. |
| STEADFASTNESSES | • steadfastnesses n. Plural of steadfastness. • STEADFASTNESS n. the state of being steadfast. |
| UNSTEADFASTNESS | • unsteadfastness n. The quality of being unsteadfast. • UNSTEADFASTNESS n. the state of being unsteadfast. |