toughened vs rugged

toughened and rugged both are adjectives.

Word	Noun	Adjective	Verb	Adverb
toughened	No	Yes	No	No
rugged	No	Yes	No	No

toughened (adjective)	rugged (adjective)
physically toughened	sturdy and strong in constitution or construction; enduring
made hard or flexible or resilient especially by heat treatment	having long narrow shallow depressions (as grooves or wrinkles) in the surface
	very difficult; severely testing stamina or resolution
	topographically very uneven