廉価|れんかrenka[1]atamadaka (head-high)

1. noun, na-adjectivelow price; moderate price

• Synonym格安かくやすNeutralSuggests exceptionally low prices and is at home in ads and everyday speech, as in 「格安航空券」; 「廉価」 is the more written word.
• Synonym低廉ていれんWrittenA written-style word for low prices, used mostly of costs and fees, as in 「低廉な料金」.
• Synonym安価あんかNeutralMeans low-priced with a somewhat written flavor, and can also mean shallow, as in 「安価な同情」 — a sense 「廉価」 lacks.
• Synonym安いやすいNeutralThe everyday word for cheap and by far the commonest; 「廉価」 is a written, commercial term.
• Synonym割安わりやすNeutralMeans cheap for the quality or quantity you get — good value; 「廉価」 only says the price is low.
• Synonym安手やすでNeutralCovers cheap goods or a cheap look and carries a derogatory nuance; 「廉価」 states a low price without any negative coloring.
• SynonymチープNeutralA loanword meaning cheap, often with a shabby, downmarket tinge that 「廉価」 does not have.
• Related安上がりやすあがりCasualColloquial for coming cheap or costing little; the emphasis is on keeping total outlay down, not on the price tag itself.
• Related安あがりCasualA variant way of writing 「安上がり」: colloquial, for things done or obtained at little cost.
• Antonym高価こうかNeutralThe antonym: expensive, the direct opposite of 「廉価」.
• Antonym高額こうがくNeutralThe antonym for large sums and amounts, standing against the low prices 「廉価」 describes.

For everyday 'cheap', 「安い」 is the default and ads favor 「格安」. 「廉価」 itself is a written, commercial word for low-priced goods, as in 「廉価版」 and 「廉価販売」. Say 「割安」 for good value for money and 「高価」 for expensive.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 値段ねだんの安やすい様子ようす。