great

superb

Extremely impressive, first-rate

• outstandingExceptionally good or unpaid
• exceptionalNotably above the norm
• marvelousExtremely good, inspiring wonder

wonderful · impressive · fantastic · terrific · splendid · magnificent · exemplary · superior · first-rate · top-notch

awesome

Extremely impressive or overwhelming

• fantasticRemarkably good or unreal
• wonderfulExtremely good, inspiring delight
• coolCalm or fashionable

terrific · brilliant · excellent · amazing · incredible · fabulous · tremendous · spectacular · splendid · marvelous

vast

Extremely great in size

• expansiveCovering a large area
• immenseExtremely large in scope
• boundlessWithout any boundaries

enormous · huge · gigantic · colossal · massive · extensive · grand · towering · monumental · substantial

milestone

Notable event marking progress

• breakthroughSudden important advance
• triumphResounding, celebrated victory
• victoryDefeating an opponent

success · accomplishment · feat · masterpiece · discovery · invention · pinnacle · landmark · heroic · legendary

grandfather

Father's or mother's father

• grandmotherMother of a parent
• grandparentParent once removed
• grandchildOffspring's offspring

ancestor · forebear · patriarch · matriarch · descendant · dynasty · genealogy · heritage · bloodline · ancestry

authority

Power to enforce obedience

• powerEnergy transfer rate
• leadershipAbility to direct others
• impactForceful contact or consequence

significance · importance · eminence · prominence · stature · prestige · renown · distinction · dominance · clout

• positive wordsyes, good, excellent, wonderful, fantastic
• complimentssmart, talented, beautiful, funny, awesome
• exclamationsoh, yes, no, wow, hey
• hard G wordsgag, game, gap, gas, gate
• informal approvalokay, cool, nice, awesome, good
• Positive exclamationsawesome, amazing, wow, yes, woohoo