durable (adj.)

• abiding
• adamantine
• aged
• ancient
• antique
• bulky
• cartilaginous
• changeless
• chewy
• chronic
• cohesive
• constant
• continuing
• coriaceous
• dense
• dependable
• enduring
• evergreen
• fast
• fibrous
• firm
• fixed
• frozen
• gristly
• hard
• hardy
• heavy
• immobile
• immutable
• indestructible
• intact
• inveterate
• inviolate
• lasting
• leatherlike
• leathery
• long-lasting
• long-lived
• long-standing
• long-term
• macrobiotic
• massive
• perdurable
• perennial
• permanent
• perpetual
• persistent
• persisting
• quiescent
• reliable
• remaining
• resistant
• rigid
• ropy
• rugged
• sinewy
• solid
• sound
• stable
• static
• stationary
• steadfast
• steady
• stiff
• stout
• stringy
• strong
• stubborn
• sturdy
• substantial
• sustained
• tenacious
• torpid
• tough
• unaltered
• unchangeable
• unchanged
• unchanging
• unchecked
• unfading
• unfailing
• untiring
• unvaried
• unvarying
• unyielding
• vigorous
• viscid
• vital
• well-founded
• well-grounded
• well-made
• wiry