Difference between Unusual and Rare

UNUSUAL vs RARE: ADJECTIVE

Not usual or common or ordinary
Being definitely out of the ordinary and unexpected; slightly odd or even a bit weird
Not usual, common, or ordinary.
Not commonly encountered
Not usual; uncommon; rare
Unlike what is expected; differing in some way from the norm.
More than usual.

Marked by an uncommon quality; especially superlative or extreme of its kind
Having low density
Not widely distributed
Not widely known; especially valued for its uncommonness
(of meat) cooked a short time; still red inside
Infrequently occurring; uncommon.
Excellent; extraordinary.
Thin in density; rarefied.
Cooked just a short time so as to retain juice and redness.
Thin; of low density
Very uncommon; scarce.
Cooked very lightly, so the meat is still red (in the case of steak or beef in the general sense).
Characterized by wide separation of parts; of loose texture; not thick or dense; thin.
Thinly scattered; dispersed.
Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
Not frequent; seldom met with or occurring; unusual.
Nearly raw; partially cooked; not thoroughly cooked; underdone.
Recurring only at long intervals

Not usual; not frequent; not common; rare; strange; as, an unusual season; a person of unusual erudition.
Synonyms Uncommon, unwonted, singular, remarkable, odd.
Slightly odd or even a bit weird

Early.
Not thoroughly cooked; partly cooked; underdone: applied to meat: as, rare beef; a rare chop.
A dialectal form of rear.
An obsolete form of roar.
Thin; porous; not dense; of slight consistence; rarefied; having relatively little matter in a given volume: as, a rare substance; the rare atmosphere of high mountains.
Thinly scattered; coming or occurring at wide intervals; sparse; dispersed.
Very uncommon or infrequent; seldom occurring or to be found; hardly ever met with.
Hence Remarkable from uncommonness; especially, uncommonly good, excellent, valuable, fine, or the like; of an excellence seldom met with.
Synonyms Rare, Scarce, infrequent, unusual. Rare implies that only few of the kind exist: as, perfect diamonds are rare. Scarce properly implies a previous or usual condition of greater abundance. Rare, means that there are much fewer of a kind to be found than may be found where scarce would apply.
Singular, extraordinary, incomparable, choice.
(of meat) cooked a short time
Marked by an uncommon quality
Not widely known
Still red inside

Eery, Singular, Eerie, Different, Freaky, Curious, Exotic, Unique, Unaccustomed, Weird, Extraordinary, Odd, Peculiar, Strange, Uncommon

Seldom, Remarkable, Atypical, Rarely, Unheard, Unusual, Rarity, Thin, Raw, Rarefied, Scarce, Rarified, Extraordinary, Infrequent, Uncommon

Eery, Singular, Eerie, Different, Freaky, Curious, Exotic, Unique, Unaccustomed, Weird, Extraordinary, Odd, Peculiar, Strange, Uncommon

Seldom, Remarkable, Atypical, Rarely, Unheard, Unusual, Rarity, Thin, Raw, Rarefied, Scarce, Rarified, Extraordinary, Infrequent, Uncommon

Try combining common first names with unusual last names, or unusual first names with common last names.
It appears that a pig in prison was not unusual, nor was it unusual for that pig to endure quite a lengthy stay.
They meet in the most unusual of circumstances and their relationships grows in the most unusual of ways.
The Eighth Amendment prohibits cruel and unusual punishments, and torture would surely meet the standard of cruel and unusual.
Suspicious orders include, but are not limited to, orders of unusual size, orders deviating substantially from a normal pattern, and orders of unusual frequency.
The unusual ruling follows a bench trial a few weeks ago for an unusual case brought by a prospective buyer in small claims court.
Extraordinary or exceptional events: such as unpredictable or unusual events requiring urgent, impromptu and unusual workforce.
Reversal of more than a few positives per year for most companies is unusual, though some industries and locations have unusual circumstances.
Routinely monitors financial exception reports for unusual activities, transactions, and investigates anomalies or unusual transactions.
Other unusual acts or unusual behavior that may suggest drug or alcohol use.

They exceeded expectations, which is rare these days.
Practical Methods for Sampling Rare and Mobile Populations.
This is an optional step, and is generally only used if your card is an ultra rare, a rare holo or a promo.
Rare Fish Tracker helps you keep track of the rare fish you have caught in your pursuit of fishing achievements.
Bipolar disorder is extremely rare in children, and although it can begin in adolescence, this is also rare.
The Drum Broker has launched Rare Rhythm Paints, a sample pack featuirng a collection of original and rare percussion samples by Dougles Fitch.
Rare birds: A few rare bird species were mapped using data supplied by MD DNR from their Ecologically Significant Areas database.
Nicely rare or medium rare, they are moved to rest and the pan deglazed with red wine.
Rare Coin Investments for decades has consistently offered better quality in rare coins.
Other symptoms may be rare or very rare.