Synonyms for Profitability:

n.

commercial, speculation, boom, speculative, arbitrage, commercialism, yield, pay. expediency/expedience (noun)
profitableness.
profitability (noun)
profitableness.

Other synonyms:

boom, pay, commercialism, speculation, commercial, arbitrage. speculative, yield. Other relevant words:
commercialism, boom, speculation, yield.