item or commodity for sale, merchandise

(generally) difference / (arithmetic) difference

two things [small or without a counter category]

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

different / distinct / separate / vary / discrepancy / gap / difference / disparity / margin / variation / divergence

spring range / spring tide range

whatchamacallit, X

What? What did you say?

anything; whatever one likes

something