hard vs knotty

hard and knotty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hard	No	Yes	No	Yes
knotty	No	Yes	No	No

hard (adjective)	knotty (adjective)
produced without vibration of the vocal cords	highly complex or intricate and occasionally devious
resisting weight or pressure	used of old persons or old trees; covered with knobs or knots
dispassionate	making great mental demands; hard to comprehend or solve or believe
(of speech sounds); produced with the back of the tongue raised toward or touching the velum	tangled in knots or snarls
(of light) transmitted directly from a pointed light source
not easy; requiring great physical or mental effort to accomplish or comprehend or endure
being distilled rather than fermented; having a high alcoholic content
unfortunate or hard to bear
given to excessive indulgence of bodily appetites especially for intoxicating liquors
dried out
very strong or vigorous
characterized by effort to the point of exhaustion; especially physical effort

hard (adverb)	knotty (adverb)
with effort or force or vigor
to the full extent possible; all the way
slowly and with difficulty
causing great damage or hardship
with firmness
indulging excessively
earnestly or intently
with pain or distress or bitterness
very near or close in space or time
into a solid condition