node (n.)

• amplitude
• antinode
• block
• body
• cake
• clump
• cluster
• concrete
• concretion
• conglomerate
• conglomeration
• crest
• crux
• diffraction
• dilemma
• enigma
• frequency
• interference
• knot
• light
• lump
• mass
• nodule
• oxymoron
• paradox
• period
• perplexity
• poser
• puzzle
• quandary
• ray
• reinforcement
• resonance
• solid
• teaser
• trough
• wave
• wavelength