open

[1]	open up
[2]	open up
[3]	open up
[4]	unfold , spread , spread out
[5]	open up
[6]	open up
[7]	afford , give
[8]	begin , start , initiate , commence , get under way , inaugurate , launch , put in/into operation , activate , get going , set in motion , establish , set up , (Colloq) get/start the ball rolling , get/put the show on the road , kick off
[9]	unlock , unbar , unlatch , unbolt , unfasten , uncover , uncork , unseal , undo , untie , unwrap , pull out
[10]	unblock , clear , unobstruct , unclog , unstop
[11]	disclose , unveil , uncover , expose , display , show , exhibit , reveal , divulge , bring to light , communicate , bring out , unbosom , explain , present , announce , release , publish , air , make known , advertise
[12]	expand , spread (out) , stretch out , open up/out , unfurl , extend
[13]	present , offer , furnish , provide , afford , yield , reveal , uncover , raise , contribute , introduce

[1]	clear
[2]	outdoors , out-of-doors , open air
[3]	surface

adj.

[1]	ajar , gaping , agape , unfastened , unlocked , unbarred , unbolted , unlatched , unclosed
[2]	yawning , agape , uncovered , revealed , unsealed , exposed , bare
[3]	unwrapped , unsealed , unfastened
[4]	free , accessible , public , available , obtainable , unrestricted , unobstructed , unencumbered/unincumbered , unimpeded , unhindered , unhampered , unregulated , unconditional , unqualified
[5]	unprotected , unenclosed , unsheltered , bare , uncovered , exposed
[6]	unsettled , unagreed , unsigned , unsealed , unclinched , unestablished , unconcluded , undecided , pending
[7]	undecided , unsettled , unresolved , debatable , arguable , problematic , moot , (US) up in the air
[8]	unscheduled , unbooked , unspoken for , unreserved , uncommitted , free , unpromised
[9]	clear , unobstructed , wide open , uncluttered , roomy , spacious , extensive , expansive , treeless , uncrowded , unfenced , unenclosed , ice-free , navigable , unblocked , passable
[10]	available , unfilled , vacant , untaken
[11]	receptive , open-minded , flexible , amenable , persuasible/persuadable , pliant , willing , responsive
[12]	exposed , public , well-known , widely known , unconcealed
[13]	evident , obvious , conspicuous , manifest , clear , unconcealed , unequivocal , plain , palpable , apparent , patent , downright , out and out , blatant , flagrant , glaring , brazen
[14]	generous , liberal , charitable , unreserved , open-handed , liberal , munificent , magnanimous , big-hearted , beneficent , bounteous , unselfish , unstinting , humanitarian , altruistic
[15]	unreserved , candid , frank , outspoken , straightforward , forthright , direct , honest , sincere , guileless , artless , fair
[16]	free , unfastened , unrestrained , unconstrained , uninhibited , unreserved , unrestricted
[17]	unfolded , extended , spread (out) , outstretched , outspread
[18]	liable , exposed , subject , susceptible , exposed , inclined , predisposed , disposed
[19]	unprotected , undefended , unfortified , exposed
[20]	opened
[21]	assailable , undefendable , undefended
[22]	loose
[23]	undecided , undetermined , unresolved
[24]	opened
[25]	receptive
[26]	overt
[27]	capable , subject
[28]	clear
[29]	candid , heart-to-heart