colossal (adj.)

• abysmal
• aerial
• airy
• altitudinous
• ascending
• aspiring
• astronomic
• astronomical
• awe-inspiring
• awesome
• boundless
• bulky
• cosmic
• cyclopean
• dominating
• elephantine
• elevated
• eminent
• enormous
• epic
• ethereal
• exalted
• extensive
• extraordinary
• galactic
• gangling
• gangly
• gargantuan
• giant
• gigantic
• haughty
• heroic
• high
• high-pitched
• huge
• immeasurable
• immense
• incredible
• infinite
• jumbo
• king-size
• lank
• lanky
• large
• leggy
• lengthy
• lofty
• long
• long-legged
• mammoth
• massive
• mighty
• monstrous
• monumental
• mountainous
• outsize
• overgrown
• overlooking
• overwhelming
• prodigious
• profound
• prominent
• rangy
• sizable
• soaring
• spacious
• spectacular
• spiring
• staggering
• statuesque
• steep
• stupendous
• sublime
• superlative
• supernal
• tall
• titanic
• topless
• topping
• towering
• tremendous
• unbelievable
• uplifted
• vast
• voluminous
• weighty
• wonderful