supplementary
Added to complete
Supplementary means serving to complete or add to something else: supplementary materials, supplementary income.
A supplementary angle combines with another to make 180 degrees.
The word often describes things that enhance but aren't essential—additional resources, extra information, backup support.
Supplementary and supplemental are interchangeable in most contexts.
Stored duplicate for recovery
- reserveSupply kept back
- standbyReady substitute awaiting use
- spareHeld in reserve
- substituteReplacement for another
stopgap · provisional · interim · contingent · reinforcement · fallback · support · relief
Additional, beyond necessary
- addedIncluded as extra
- bonusReward beyond expectation
- add-onOptional supplementary component
- incrementalProceeding by small additions
extension · plus · further · more · expanded · enlarged · increased · appended
Interpreting written text
- materialsRaw stuff for creation
- courseworkStudent academic tasks
- tutorialInstructional step-by-step guide
- textbookAcademic subject manual
workbook · handout · resources · curriculum · syllabus · exercises · appendices · bibliography
Essential organic nutrients
- mineralsInorganic natural solids
- proteinFolded amino chain
- multivitaminsCombined nutrient supplements
- omega-3Polyunsaturated dietary fat
probiotics · calcium · iron · zinc · magnesium · antioxidants · electrolytes · fiber
Offering help and reassurance
- enhancingIncreasing quality or value
- completingReaching the end of
- accompanyingGoing along with another
- balancingAchieving equal distribution
corresponding · correlative · reciprocal · synergistic · harmonizing · matching · parallel · counterpart
backup
Stored duplicate for recovery
substitute · stopgap · provisional · interim · contingent · reinforcement · fallback · support · relief · emergency
extra
Additional, beyond necessary
incremental · extension · plus · further · more · expanded · enlarged · increased · appended · attached
reading
Interpreting written text
- materialsRaw stuff for creation
- courseworkStudent academic tasks
- tutorialInstructional step-by-step guide
textbook · workbook · handout · resources · curriculum · syllabus · exercises · appendices · bibliography · references
vitamins
Essential organic nutrients
- mineralsInorganic natural solids
- proteinFolded amino chain
- multivitaminsCombined nutrient supplements
omega-3 · probiotics · calcium · iron · zinc · magnesium · antioxidants · electrolytes · fiber · dietary
supportive
Offering help and reassurance
- enhancingIncreasing quality or value
- completingReaching the end of
- accompanyingGoing along with another
balancing · corresponding · correlative · reciprocal · synergistic · harmonizing · matching · parallel · counterpart · cooperative
- secondarysecondary, second fiddle, second string, second choice, second place
- angle termsacute, obtuse, right, straight, reflex
- geometryangles, circles, angle, shapes, lines
- math termsnumbers, plus or minus, linear growth, square, operand
- additionsum, plus, add, addend, addition
- nonessentialunnecessary, unneeded, nonessential, inessential, dispensable
supplementaryessential
Fundamentally necessary
necessary · required · indispensable · vital · requisite
supplementarysubtractive
Involving removal or reduction
reductive · diminishing · deducting · less
- supplementary anglesAngles summing to 180°
- vitamin supplementationIngesting additional essential nutrients