連山|れんざんrenzan[1]atamadaka (head-high)

1. nounmountain range
2. nounLian Shan (Xia-period method of Chinese divination)

• Synonym連峰れんぽうWrittenWritten word for a continuous chain of peaks, with the focus on the peaks themselves; nearly interchangeable with 「連山」.
• Synonym山脈さんみゃくNeutralThe most common word in daily use and geography; stresses a belt-like stretch of mountain terrain.
• Synonym山系さんけいFormalFormal geographic term for connected peaks forming one system, as in 「飛騨山系」; 「連山」 is more for written description.
• Synonym山並みやまなみNeutralMountains seen stretching into the distance; used in both speech and writing with a scenic feel, while 「連山」 leans written.
• Synonym群山ぐんざんWrittenA written word, though rarely used; stresses many peaks gathered together.
• Antonym平地へいちNeutralFlat, level ground — the neutral opposite of the rolling ups and downs of 「連山」.
• Antonym孤峰WrittenA lone, isolated peak — the written opposite of the unbroken sweep of 「連山」.

For rolling, connected mountains in written or scenic prose, use 「連山」 or 「連峰」. In everyday speech and geography, 「山脈」 is the default. 「山並み」 suits a distant view; 「山系」 names a system like 「飛騨山系」; 「群山」 is a rare written word. Opposites: 「孤峰」, 「平地」.

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

1. 山やまが連つらなっているもの。連峰れんぽう。