Recondite, abstruse, occult, esoteric can all mean being beyond the power of the average intelligence to grasp or understand.
Recoil vs Shrink vs Flinch vs Wince vs Blench vs Quail
Recoil, shrink, flinch, wince, blench, quail can all mean to draw back from something, usually through fear, faintheartedness, or disgust.
Recognition vs Identification vs Assimilation vs Apperception
Recognition, identification, assimilation, apperception are comparable when they designate a form of cognition which relates a perception of something new to knowledge already acquired.
Recluse vs Hermit vs Eremite vs Anchorite vs Cenobite
Recluse, hermit, eremite, anchorite, cenobite all designate a person who lives apart from the world usually in order to devote himself to prayer, contemplation, and penance.
Reciprocate vs Retaliate vs Requite vs Return
Reciprocate, retaliate, requite, return can mean to give back usually in kind or in quantity.
Reciprocal vs Corresponding vs Correlative vs Complementary vs Complemental vs Convertible
Reciprocal, corresponding, correlative, complementary, complemental, convertible are not close synonyms, although in some instances they are interchangeable, and all are comparable in meaning like, equivalent, or similarly related to each other (as in kind, quality, or value).
Reciprocal vs Mutual vs Common
Reciprocal, mutual, common mean shared, experienced, or shown by each of the persons or things concerned.
Reception vs Receipt
Reception, receipt both mean a receiving, but they are not often interchangeable, their use being dependent upon accepted idiom.
Receive vs Accept vs Admit vs Take
Receive, accept, admit, take can all mean to permit to come into one's possession, presence, group, mind, or substance.
Receipt vs Recipe vs Prescription
Receipt, recipe, prescription are comparable when they mean a formula or set of directions for the compounding of ingredients especially in cookery and medicine.
Recede vs Retreat vs Retrograde vs Retract vs Back
Recede, retreat, retrograde, retract, back can all mean to move or seem to move in a direction that is exactly the opposite of ahead or forward.
Rebound vs Reverberate vs Recoil vs Resile vs Repercuss
Rebound, reverberate, recoil, resile, repercuss are comparable when they mean to spring back to an original position or shape.