row ②company (of someone) ③counter for rows

line ②matrix

standing in a row

rank

front row

rank (of troops)

parallelization

series ②keiretsu (group) ③affiliated

line of battle

(a) row

arrangement ②array

ship of the line

exhibition

arranging in a line ②parallel (electronics, computing, etc.)

front row

series (e.g. electrical) ②serial

enumeration

sequence ②several lines

attendance

back row

train

the Japanese islands

archipelago

limited express train

nations

attendance

freight train

stone circle

major powers of the world

list

down-train

attendee

heritage railway train (typically running on a scenic tramway previously used for logging or mining)

enumeration

up-train

to line up with ②to attend

limited express train

regular train

rapid-transit train

night train